McFee exhaled a lungful of smoke. "He's quite a guy, isn't he?"

Deliberately Hanley dropped his feet to the floor and sat erect.

"Listen," he said, "he's the Robin Hood of the day, if you can possibly

remember your ancient history. Two years ago he swiped the electrolic

jewels from the atomic motors of the _Fortuna_, the gambling space

ship, broke them into two hundred parts and gave them to the Society

for Orphaned Children. A year ago he entered the inner rooms of the

Venus Gallery and made off with the _Cosmic Lady_, the greatest

painting of the age.

"The man's a wizard. No vault door, no lock mechanism keeps him out.

He walks in, takes what he wants, and leaves before the I.P. men know

what's happened. All they find is that little pastel-blue card with the

cluster of white dots in the shape of the Constellation Orion. That's

what gave him the name of the Nebula, you see."

McFee nodded. "I know," he said, "but who is he? And what's his

permanent address?"

For a moment Hanley said nothing. He reached in his pocket, drew out a

bulldog pipe and a worn tobacco pouch. A glitter was slowly entering

his eyes. "You know," he said, "I have half a mind to try and find out

at that."

* * * * *

The mercury clock over the white mantel chimed the hour of eight A.M.,

and Jimmy Starr sat up in bed yawning. As the last note faded into

silence, the door of the room opened, and a white-haired man entered,

carrying a tray.

"Good morning, Mr. Starr."

"Good morning, Peters," Jimmy said. "Did you bring the paper?"

The servant nodded, propped a morning edition against Jimmy's upraised

knees and placed the breakfast tray on the side of the bed. "Will you

have orange juice or Martian melon today?" he asked.

"Orange juice, I believe," replied Jimmy absently, and then coughed

to hide the sudden tenseness that had entered his voice. He waited

impatiently while the aged servant opened the window blinds and busied

himself about the room.

When at last the man had gone, Jimmy sat bolt upright and stared at

the screaming type.

NEBULA ON THE LOOSE AGAIN

GENTLEMAN BURGLAR PROVES

TO BE COMMON CRIMINAL

The running story was bitter in its denunciation. Where before those

same columns had accepted each new exploit of the Nebula as a prank

upon the police and an irritation to the wealthy, they now demanded

legal action. For this time the Nebula had committed murder!

The Crater City Museum had been robbed during the night. Three

priceless Thro-Pahl figurines had been stolen. An aged night watchman

had been brutally beaten to death.

"The guilt is undeniable," the paper continued. "Drunk with power, this

sadist had the effrontery to leave behind one of his mocking cards.

What are the police going to do about it?"

Jimmy Starr leaned back and let a soft whistle escape from his lips.

The newspaper story was all wrong. For Jimmy Starr had spent the entire

night in his apartment. And Jimmy Starr was the Nebula!

He didn't know quite how long he had been playing this dual role.

Years now, ever since his father, Randall Starr, president of the

Triplanetary Freight Lines had been murdered and had left his enormous

fortune to his son.

Randall Starr had come up from poverty with his only heritage, a

brilliant mind and skillful hands. He had dabbled in a little of

everything before he had become associated with the Venus-Mars-Earth

shipping business. But all during his years of executive activity, he

had always found time for two things: his hobby, the manufacture and

study of theft-proof materials and devices; and the deciphering of the

ancient _Lost Chronicles_ of Mars.

It was this last that had resulted in his untimely end. Jimmy Starr

had known for a long time that his father was on the verge of a great

discovery, but what that discovery was he had had no inkling.

"Wait 'til I've finished," Randall Starr would always say when

questioned. "Some day I'll have an announcement to make that will

startle all Mars."

And then one night Jimmy Starr had been wakened by a terrific crash

downstairs in the lower-floor study. He had rushed to the room to

find his father stretched out on the floor, blood trickling from a

gaping wound in his head. The window was open, showing the way of the

assailant's escape. Randall Starr's filing cabinet had been thrown to

the floor and battered open with some heavy instrument. Papers lay

strewn about in wild disorder.

Jimmy knelt at his father's side, in time to hear the old man's last

gasping words. "The ... Chronicles ... they took ... the five cyphers.

You must get them back, Jimmy, before the last one is completed and the

secret discovered. You must, do you understand? The future of all life

on this planet depends on it."

"Who...?" choked Jimmy. "Tell me who, and I'll...."

But the effort had been too great. The old man fell back, his warning

unfinished.

Clues? Jimmy had employed the finest detectives on Mars in a vain

attempt to track down the guilty one. He had followed trails himself,

questioned all of his father's former friends and associates. The one

and only shred of evidence he had led him no place. This was a polished

_falpa_ button which Randall Starr had torn from his assailant's tunic

during the struggle--the type of button which members of the limited

_superiors_ class effected. The _superiors_ were a throw-back to the

feudalistic days of a by-gone age. Powerful overlords with inherited

political and financial power, they still wielded a strong influence

over an otherwise partially modernized society.

So this much Jimmy knew--his father had been murdered and the

_Chronicles_ cypher taken by a man who walked in the highest brackets

of the System's social worlds.

* * * * *

In time Jimmy's grief passed, and he began to follow in his father's

footsteps. Theoretically, he was acting head of Triplanetary. But

with the shipping line operating smoothly with hundreds of efficient

under-officials, there was little for him to do. After graduating from

the Martian School of Technology, he toured the System in his own

space-yacht. It was that trip that brought home to him the poverty and

sordid conditions existent in the various worlds.

On Venus he had seen powerful land-owners growing fat and rich while

native Kamalis and Sarakans toiled in the swamps. On Mars he had toured

the luxurious plaisances and estates of the D.O.F.C--the Descendents

of the First Colonists--and a hundred miles out in the desert had

walked through the stinking narrow streets of the Thedras, the despised

aboriginals of the West Plateaus.

Then and there Jimmy Starr had decided to add a twofold purpose to his

life. He would do all in his power to aid the oppressed poor, and he

would strain every effort to plague the lives of the _superiors_ class.

Some day, in some way, that effort would lead him, he felt sure, to his

father's murderer and the stolen _Chronicles_ cypher. The only item in

question was the time element.

He spent six months in his father's private library, studying

everything he could find on locks, time vaults, hermetic chambers and

impenetrable walls. Six months more went into a thorough reading on the

various subjects of criminology, micro-fingerprints, robot detectors.

He had begun quietly at first, a small art treasure taken from the

collection of some greedy _superiors_ millionaire. But gradually the

daring of those thefts, the absolute lack of clues, with the exception

of the tell-tale blue card, had attracted attention. In a year his fame

had spread as far as Pluto. In six months more the Nebula was a byword

in every tongue.

The police had sworn action, the press had chuckled, and the public had

looked with open admiration on this benefactor of the downtrodden.

Now all that was over. The Nebula was a criminal. He was accused of

murder.

Slowly Jimmy Starr got out of bed and began to dress. Funny, he had

never thought of this contingency. Someone had seen an opportunity to

profit by his name, and had utilized it with cold-blooded efficiency.

He lit a cheroot and stood there smoking. A bell tinkled behind him,

announcing a call on the visiphone. He crossed to the panel, touched

a stud. A voice came out of the speaker, but no image appeared on the

vision screen.

"_Good morning, Nebula!_"

An electric shock swept through him. His cheroot slipped from his

fingers.

"_Good morning, Nebula. Answer please._"

Mechanically Jimmy's fingers found the transmitting button and clicked

it over. But he stood out of range of the vision screen as he replied,

"Who's speaking?"

The feminine voice, sweet and musical, laughed gaily. "I'm sorry I

can't tell you that. You may call me Andromeda, if you will. Now listen

closely, Jimmy Starr. I know your secret. I know that you live a dual

life, that you are that much sought after gentleman cracksman, the

Nebula."

The voice laughed again, but there was no mockery in it. "You needn't

be afraid, Jimmy, I'm not going to let the cat out of the bag. But I

will, unless you agree to follow my orders. Is that clear?"

For a long moment Jimmy stood there in silence.

"Never mind," the voice continued, "I didn't expect you to admit it.

But listen. The Nebula is no longer a champion of the poor. In the eyes

of the press and the police, he has committed murder. I know that you

are innocent of that charge. It is now eight-thirty. In exactly fifteen

hours you will go to the central offices of the Crater City Trust

Company at Ninth and Planet. You will enter in any way you see fit,

open the vault and take from the compartment marked W-203 the three

articles it contains. Do you understand? Compartment W-203."

There was a click and the visiphone was silent.

Frantically Jimmy twisted the control switch on and off. "Hello," he

said, "hello!"

* * * * *

He turned slowly to face the looking glass on the opposite wall

mirrored the sudden haggardness that had entered his features. In half

an hour his entire world had crashed. His identity was known. He was

wanted for a foul crime.

Yes, he had been hunted before, but now the police and the I.P. men

would leave no stone unturned in their efforts to capture him. His

pursuers would be relentless.

He paced to the window and looked down on the Martian city. To the

east where the main sky ramp led to the city's space port lay the

huge ditch that was the beginning of Canal Grand. Like a crayon smear

on a piece of cardboard, it stretched off into the desert, bleak and

desolate.

* * * * *

At fifteen minutes past eleven that night Jimmy Starr opened a panel in

his room and took his place in a cylindrical shell, touched a control

and settled back. Save for a slight jar and an audible hum, there was

no sensation of movement. Moments later the tube-cage jarred again,

the door slid open, and he climbed out on a small lighted kiosk in the

center of a well of darkness. A narrow ramp led upward, and he made his

way to the street level in a few quick strides.

He now stood on the intersection of Ninth and Planet.

Jimmy Starr sauntered across the street, studying each passerby out of

the corner of his eyes. Before the entrance of the Crater City Trust

Company he paused to light a cheroot. He stood there, smoking quietly

while a turbaned Kagor from the North Desert Country shuffled by,

dragging his cumbersome third leg after him.

Then he slipped open his tunic, exposing a small compact carry-case

strapped about his middle. Opening it, he selected from its array of

objects a slender metal tube, capped at one end. To this he quickly

fastened a small ball of hardened carponium clay. He unscrewed a cap in

the clay ball and inserted a small pellet.

With flying fingers, he shoved the tube hard against the door lock.

That lock was not the best, but it was one of the most dependable

theft-proof devices on the market.

Mentally he counted the seconds as each pulsation within the tube was

transmitted to his hand. At the tenth he stiffened. There was a dull

thud, a little puff of smoke, and a grating and jangling as of breaking

glass.

Then he was inside, pacing down the center aisle of the main office.

He had no need for a torch. The place was brilliantly lighted with

overhead carboliers, and he knew that he was clearly visible from the

street.

In rapid strides he reached the far end of the office, where an

enormous vault door of _arelium_ steel was imbedded in a frame of

_kartite_. That frame was anchored in natural rock piers ninety feet

below. The entire structure was as impregnable as human intellect could

make it.

Jimmy Starr leaped over the low railing that separated the vault from

the office proper. Again he opened the little carry-case and from a

lower compartment took out a tightly rolled Martian papyrus.

He was working fast now, putting into action a plan that he had formed

on his visit to this office earlier in the day. Then, while he had

stood discussing the financial status of Triplanetary Shipping with

one of the Trust Company officials, he had managed to slip out a tiny

camera and, unobserved, take a quick photograph of the rear wall of the

office.

Back in his own apartment it had been the work of a few moments to

transfer the scene on the negative onto this elastic papyrus.

He stood up on the railing, fastened the two ends of the papyrus to the

side wall; then, utilizing all his strength, stretched it across the

full width of the office to the opposite wall.

Finished, he slipped behind the screen with a gay laugh. Let a passerby

gaze in the street window now. He would see a deserted office with the

unmolested vault in clear view. From the street no one could know that

vault was an enlarged photograph on a screen, and that behind that

screen crouched the most wanted cracksman on Mars--the Nebula!

He spent a moment surveying the massive vault. "Craig-Orlan, Series A.

Model Four," he muttered appreciatively. "Mercury time lock, rondulated

tumblers, protected with individual micacaps. This is going to be

tough."

He took from the carry-case a pair of earphones, snapped them on and

pressed their connection to the panel just below the main dial. Slowly

he began to turn that dial, straining his ears for tell-tale clicks.

The silence of the office pressed down upon him. Far off sounded the

hollow roar as the night Earth Express blasted down to its cradle.

For several minutes he continued. Then his brow furrowed in a frown.

"Must have a shield of some kind behind it," he muttered. He opened

the carry-case again, drew forth a tiny electrolic drill with a

wedge-shaped bit. A low hum sounded as he switched the drill on and

pressed it against the panel.

When an aperture of half an inch in depth had been bored, he removed

the drill and placed in the opening another of his pellets. Ten seconds

and the puff of blue smoke. Once more he slipped on the headphones.

This time a smile of satisfaction turned his lips. In the receivers he

could hear distinctly each metallic click as the grooved tumblers fell

into position. He reached up now and shoved a huge _kapar_ bar far over

in its slot. On silent hinges the enormous vault door began to open.

But this was only the beginning. It was a full hour before he had

penetrated the second and third inner doors of the vault, another half

hour before he located in the vast array of files, Compartment W-203.

* * * * *

About to open it, he stood motionless in thought. What was he doing

here? Why was he ransacking the vault of the Crater City Trust, one of

the most respected and ethical financial institutions in the city? He

wanted nothing of theirs. More than that, there was a murder charge

on his head, and he was deliberately taking chances when all logic

screamed at him to hide.

As in a dream he heard that musical voice that had come over the

visiphone, "_Listen, Jimmy Starr, I know your secret_...." He inserted

a false key in the file lock and opened it.

Nothing! The compartment was empty.

A wave of bitterness swept over him. He thrust the compartment

shut savagely and turned to leave the vault. Half way he halted in

mid-stride.

A sound had reached his ears from the opposite side of the papyrus

screen, the sound of someone fumbling with the latch of the front

entrance door.

Quickly Jimmy passed through the three doors of the vault. He

paused before the combination to slide a small card under the dial.

Pastel-blue in color, that card bore the design of the constellation

Orion.

Then he reached up, whipped down the papyrus screen and crouched back

of the railing. The man at the front entrance had discovered the broken

lock; the door crashed open; excited footsteps pounded inward.

Bending low, Jimmy darted down the side aisle, keeping his head well

below the top of the desks. Once he shot a look at the intruder. It

was Hamilton Garth, president of Crater City Trust! A gray-haired man

with a wiry build, an iron visage, and heavy-browed gimlet eyes. Before

the yawning door of the vault Garth stopped short and uttered a cry of

consternation. He spun on his heel and with rapid strides made for the

door.

But not before Jimmy had reached it. He raced through the entrance just

as Garth sighted him and gave a hoarse shout.

Jimmy raced down the street a hundred yards, then hurled himself into

an alley. A police officer was running toward him, attracted by Garth's

cries.

Even as Jimmy crouched there, new sounds added to the confusion. The

alarm tocsin of the Crater City Trust shrilled up and up into the

rarified air. Far down the street the answering siren of the I.P. depot

rose in deafening crescendo. Jimmy could hear windows bang open in the

buildings across the thoroughfare. The emergency street lamps flared

on, turning the intersection into a stage of ghastly white.

The alley-way in which he crouched was a dead-end. Jimmy thrust aside

the wave of helplessness that swept over him and steeled himself for

action. The Nebula couldn't be caught. Not now with brutality dogging

his footsteps.

With a swift movement he whipped off the tunic, threw it from him.

Frantically he opened the carry-case and took from it a short

collapsible rod, a folded rakish evening cap. He shoved the carry-case

under his waist coat, hoping that the bulge would not be detected, set

the cap on his head at a jaunty angle and jerked the rod out to its

full four feet.

That rod was an explosive detonator for use on time doors when all

other means of entrance failed. But it was a cane now. Swinging it,

Jimmy darted out into the glare of the street, then began to pace

leisurely forward straight in the direction of Crater City Trust.

When he reached the entrance, a small crowd had gathered, and Hamilton

Garth was in their midst excitedly talking to an I.P. officer.

"Vault doors wide open!" he was shouting. "Second and third doors, too!

It's the Nebula! I saw his card. Why the devil don't you do something?"

The I.P. man was taking notes in a little book. "Calm yourself, Mr.

Garth," he said. "Whoever broke in here can't get away this time. The

impenetration walls have automatically closed down. The entire area is

cut off by a ring of steel."

"But it's the Nebula I tell you, you stupid fool!" cried Garth.

"While you stand there like an idiot--" The eyes of the Trust Company

president suddenly fastened on Jimmy, leaning comfortably on his

rod-cane at the edge of the growing crowd. "Mr. Starr, I'm certainly

glad to see you. Help me. Tell me what I should do...."

Nodding quietly, Jimmy stepped forward. To the I.P. he said casually,

"J. C. Starr, president of Triplanetary Shipping. How much has been

stolen, officer?"

Another I.P. man emerged from the Trust office. "Only one compartment

opened, sir. W-203."

Hamilton Garth looked bewildered. "That's odd," he said. "The W series

of files are all unused. There's nothing in any of them."

Jimmy laughed. "Mr. Garth, you can consider yourself a lucky man. The

Nebula seems to have muffed things this time. Good night."

He turned and sauntered off down the street.

* * * * *

It was the following morning, and for an hour Jimmy Starr had sat by

the visiphone in his room, waiting for a call. A tray of half-smoked

cheroots lay on the table beside the instrument.

The bell sounded. Jimmy touched the stud.

"_Good morning, Nebula. We failed last night, didn't we?_"

He leaned back in his chair and smiled. Though that haunting musical

voice stirred him deeply, he had full control of himself now. For an

hour he had been preparing mentally what he would say.

"Young woman," he said, "or Andromeda, as you choose to call yourself,

I haven't the slightest idea of what you're talking about. Yesterday

you made a connection with my instrument and hung up without revealing

your image. My name is James C. Starr, and if you wish to converse with

me, I suggest you show yourself. Otherwise...."

"Wait!" The gayness left the unseen girl's voice. "Wait, don't touch

that stud. We failed last night, Jimmy Starr. But we can't fail again

tonight. Everything is at stake. Do you understand, everything. The

very future of life here on Mars. Jimmy, what do you know about the

canals?"

"The canals?" He forgot his protestations to consider thoughtfully.

"Why nothing much. They're to be opened and filled with water in a

year. Everyone knows that. So far the locks have been giving the

engineers a little trouble, but...."

"Not a little trouble, Jimmy. A whole lot of trouble. At the present

time specifications call for a hundred and twelve locks and sub power

stations down the length of Canal Grand alone. And there are seven

hundred and eight subsidiary canals branching into the main stem.

Add to those figures the number of lesser canals branching into the

subsidiary canals, the necessary freight and passenger depots, and you

can see what a tremendous engineering project it will be."

"It can be done," Jimmy said confidently.

"It can, yes, if the engineers locate a new deposit of _pxar_, the part

organic, part inorganic material that alone will withstand the terrible

refraction-rot of the red desert country."

Jimmy didn't know what she was driving at, but what she said was true.

Refraction-rot, the multiple infra-red light radiations from the

scarlet sands of the desert played hob with all kinds of construction

work. _Pxar_ alone had the resiliency and the hardness to withstand the

terrible disintegration processes of the shifting sands. And there was

very little _pxar_ left.

The voice continued:

"Jimmy, I can't tell you everything yet. But I can tell you this. By

joining forces with me, you will be working toward the recovery of your

father's lost secret and the identification of the man who murdered him.

"Tonight at midnight you will enter the offices of Phobos Enterprises

and take from their vault the paper-wrapped box on the third shelf.

Good luck, Nebula."

* * * * *

Phil Hanley, reporter of the _Globe_, let himself into his apartment,

strode straight to the liquor cabinet and took a stiff drink. Then he

sat down before a table and spread an array of objects before him.

They were a curious collection: A polished _falpa_ button of the type

affected by members of the _superiors_ class; two panelled cards,

each with the design of the Constellation Orion, two rather blurred

photographs of finger prints, and a notebook.

These findings were the results of Hanley's activities during the

night. Still obsessed with his plan to get a signed interview with the

Nebula, he had reasoned, logically enough, that the only way to do so

was to learn first the cracksman's identity.

The button first. It was elliptical in shape and bore that curious

triangular emblem so hated by the poorer classes. Hanley had found it

on the office floor of the Crater City Trust Company. He realized,

however, that any number of _superiors_ might have business with that

establishment and that the button's presence there meant nothing.

In rotation he examined the two panelled cards and the fingerprint

photographs. He brought a powerful atolight down and studied them with

the aid of a _proberglass_.

At the end of five minutes a low whistle of amazement came to his lips.

He pushed glass and light away and brought forward the discovery he had

deliberately reserved for the last. The notebook.

There was no reason to believe it the property of the Nebula. The

Nebula didn't go around dropping private journals for inquisitive

reporters to find. Hanley had discovered it half hidden in the gutter

before the entrance of the Crater City Museum where the night watchman

had been murdered.

The notebook contained but a single page of writing. In heavy

penmanship the words read:

_The figurines are pure pxar. The breakdown analysis will prove that,

I am sure. But whether the figurines will serve their intended

purpose is a question that can be answered only by experiment. If my

decipherment of the Chronicles is correct, I must have thousands of

them, and to obtain them it will be necessary to locate the Tombs. Does

the marking Ka Ce 54 W bear any significance?_

Phil Hanley read those words twice, then leaned back, frowning.

Presently he roused himself, strode to a wall cabinet and took down a

book labeled, _Ancient Mars--the Webley Theories of the Early Life_.

He carried the book back to the table, but before he could open it,

steps sounded along the outer corridor leading to his door. A moment

later the door banged open, and a figure crossed the threshold.

Hanley had but a split instant to utter a gasp of astonished

recognition. Then he saw the heat gun leveled directly at him, and with

a twisting leap, he lunged for the connecting door of the adjoining

room.

* * * * *

Jimmy Starr was panting when he reached his room. The clock on the

mantel showed five A.M., and since midnight he had been living with

double interest his role as a fugitive.

Without realizing why, he had obeyed to the letter the instructions of

the voice on the visiphone. That single suggestion that his efforts

might lead him to the murderer of his father had spurred him on. He had

entered Phobos Enterprises, taken the package described. But getting

away this time had been a terrible ordeal.

The I.P. men were on the alert. All Crater City patrols were

in readiness. The impenetration walls were down everywhere,

checkerboarding the metropolis into five hundred separate and distinct

guarded areas.

Three times he had missed capture by a scant margin. He had crawled

sixty feet through an exhaust _zordite_ tube when any second the

motors leading to it might have seared his body to a crisp with their

discharges. With an I.P. man close on his heels, he had swung over a

dizzy canyon of space and catwalked across a sustaining bar from one

building to another. And it seemed now he could still hear that cry

that rose up to him on the building roof from the street below:

"_Death to the Nebula!_"

On the table the package for which he had risked so much lay open.

Jimmy scowled down upon its contents: three Thro-Pahl figurines, gray

in color, eighteen inches in height, each the likeness of an armor-clad

Martian of the first dynasty. To an art collector they were undoubtedly

wondrous artifacts, but to Jimmy they meant nothing.

The visiphone bell sounded. Heart pounding, Jimmy touched the stud and

heard again that voice.

"_Good morning, Nebula. We made it this time. I'm so glad._"

He stared into the blank screen silently. What did she look like, the

owner of that haunting voice? Was she dark or fair? Was she...? "Who

are you?" he said huskily.

"There isn't time for that now, Jimmy. Tell me, have you examined the

figurines?"

He had the vision plate turned on, and he nodded in reply.

"Look at them again. Look at their composition. It's not the carving

I'm--we're--interested in. It's their structure. Don't you see, Jimmy?

It's _pxar_."

He didn't see, and he waited for her to continue.

"_Pxar_--the same material that the engineers need for their

construction work for the canal locks, the only material that will

withstand the radiations of the Red Desert sands.

"Those figurines are old, Jimmy. They were carved during the days of

the First Dynasty when the original canal locks were built. Today

there's practically none left. Yet without _pxar_ the canal project is

doomed to failure.

"Now pick up one of the figurines and examine its base. Do you see that

tiny three-cornered prong that projects from it? Like a root, a stunted

root reaching out for nourishment."

* * * * *

The girl's voice became breathless. "Jimmy, that was your father's

secret. He spent the last days of his life deciphering the _Lost

Chronicles_, and for years it has been my work too. You see, chemical

analysis has proved that under certain conditions _pxar_ will grow

and reproduce its own kind. The early Martians knew this, and they

also knew that the time would come when there would be no more of it

available. So they designed those figurines to be superimposed on the

bodies of living Martians. The root-claw would then reach down, embed

itself in the flesh and suck out the vital life."

"I--I don't understand," Jimmy said slowly.

"Let me put it this way. If the base of one of those figurines is

fastened to the body of a Martian, the root will adhere to that body,

and the figurine will become a living parasite, growing and developing

in size, until amoeba-like, it will divide into two.

"Jimmy, there's a monstrous plot brewing here on Mars. Your father

discovered that secret and realized it was so deadly he meant to

lock it away forever in the files of the Interplanetary Council. But

before he could do that, he was murdered and the incomplete cyphers

stolen. Those cyphers have now been worked out. Someone has made plans

to sell an enormous quantity of _pxar_ to the development company

that's building the canal locks. They're going to create that _pxar_

by feeding those figurines and thousands like them off the bodies of

unsuspecting Martians."

"But how?" Jimmy interjected.

"I don't know how. Not yet, though I've been piecing the threads of

this puzzle together for weeks now. It wasn't until five days ago that

I was able to decipher completely the code of the _Chronicles_. I did

know that your father was working on the cypher, too, because he and

I frequented the same libraries, but it was only by accident that I

discovered that that cypher was the reason behind his murder.

"Once started, the _pxar_ plot will be a plague, a Martian black death.

Once started, those figurines will multiply and grow. And here's the

damnable part of it, Jimmy. After a certain number of the figurines

have been given life, they will also acquire self mobility. Do you

understand? It means that they will spread, advance from the body of

one Martian to another of their own accord. That's the black revelation

of the _Chronicles_--_the fact that this plague happened on this planet

once before, was responsible for the complete extinction of the first

dynasty Martians_."

He turned the gray figurine over and over in his hands. There was a

glitter in his eyes now, a glitter of excitement. Things were falling

into place in his brain like pieces of a puzzle.

"Examine those images," the girl's voice suddenly ordered. "Do you see

any mark on them at all?"

One by one he studied every inch of their surfaces. Abruptly his eyes

caught a tiny series of even scratches along the thigh of one of the

figurines.

"Ka Ce 54 W," he read slowly.

For a moment silence answered him. Then the voice uttered a low gasp.

"It's the first section of the third cypher," she said. "It means ...

wait a minute ... it means that the Tombs are in the Dur-Par section of

the desert. Jimmy, we've got to go there."

"The Tombs?" he repeated.

"Yes, according to the _Chronicles_, a secret store of thousands of

those parasitical figurines is hidden somewhere out in the Red Desert.

The first dynasty Martians, you see, prepared for the emergency which

they knew was inevitable, the disappearance of _pxar_ from this planet.

That was before they knew of the images' plague properties.

"We've got a race on our hands, Jimmy. Even now the man who first stole

the figurines may be heading directly for the Tombs."

Jimmy Starr took out a cheroot, lit it mechanically. Then he voiced a

single question. "You must have a personal interest in this matter.

What is it?"

She had the answer for that too. "My brother," she said, "is one of

the technical officials for the canal-locks project. A murder charge

was framed on him, and he was given the alternative of being 'exposed'

to the I.P. men or agreeing to accept all the _pxar_ an unidentified

source could supply with no questions asked. He has agreed.

"I ... I love my brother, but this has gone beyond personalities now.

This is plague, wholesale murder; all Mars is at stake."

Jimmy Starr made an instant decision. "Where will I meet you?" he said.

She considered. Then, "You'll find instructions at the Canal Grand

entrance. Good luck, Jimmy."

* * * * *

Half an hour later Jimmy climbed out of a tube-cage and emerged onto a

deserted square at the outskirts of Crater City. Before him, dim in the

overhead light, a sign read:

THE CANALS

POSITIVELY NO TRESPASSING

ENTER AT YOUR OWN RISK

Before the sign stood a small kiosk with dusty bulletins tacked upon

it. Jimmy waited impatiently, pacing to and fro. Then his eye caught

sight of a small envelope protruding from a crevice on the kiosk wall.

It bore no name or address, but upon its surface was the design of the

Constellation Orion.

Inside, a scrap of paper bore the written words: "_Canal Grand--south.

Way Station X. I'll meet you there._"

He pursed his lips. What kind of a game was this? Unseen speakers on

the visiphone. Mysterious messages directing him into the unknown. It

smacked of a twentieth century thriller.

All his inherent sense of danger warned him to turn back. In answer,

that haunting voice rang again in his ears: "_Good luck, Jimmy._"

He turned to the stair well and began to descend. Darkness was here,

and he could feel the thick red dust under his shoes as he went down.

Fifty-seven ... fifty-eight ... first ... second ... third level. Not

until he reached the bottom and stood before the massive door leading

into the canal did he switch on his electric torch. Then he stared.

The door yawned open. Twenty feet beyond, drawn up at the near wall of

the great ditch, was a tracto-car. And before that car there were three

men preparing to board.

Jimmy stared as he recognized the foremost of the three. Hamilton

Garth! The Trust Company official stood there calmly in the glare of

the torch, waiting for him to approach.

"What the devil are you doing here?" Garth demanded.

It was a tight question, but fortunately Garth was so absorbed in his

own plans and movements that he did not wait for an answer. "Sloan and

Barker," he said shortly, waving his hand toward his two companions.

"I.P. men. We're trailing the Nebula."

"But I thought nothing was stolen from your office," Jimmy said slowly.

"You said...."

Garth scowled. "Money, tangibles, no. But prestige, tremendously. Do

you realize, sir, what it will mean when the public learns that a cheap

cracksman can walk into my vault as if it had a revolving door? I've

offered fifty thousand _plantoles_ for the arrest of the Nebula, and

I'm going to set an example by being the first to start on his trail."

"I see." Jimmy studied him in thoughtful silence. "And his trail starts

here?"

"In the canal, yes. We received an unsigned tip half an hour ago that

the Nebula was heading south down Canal Grand. You're coming with us,

of course."

As the tracto-car rocketed dizzily down the huge ditch, Jimmy hunkered

down in the tonneau seat and let his thoughts run wild. This tip Garth

had spoken of.... Could it be that she...?

He forced his eyes toward the way ahead, deliberately guiding his

mind into other channels. It wasn't the first time he had been in

the canals, but it was the first time he had penetrated this far.

The powerful triple-beam atolight cut a swath of radiance ahead

like a chalkmark on a blackboard. Revealed in its glare were the

mountainous-high walls of red stone on either side, the red floor

between, hard packed, smooth as a pavement. Dimly in the reflected glow

he could see the serrated lines high up near the top of the near wall,

the marks of the ancient water levels, and at intervals he could see

the crumbling ruins of a counting depot.

What glory, what pomp and circumstance this mighty ditch had seen.

Gilded canopied barges of the first and second dynasty kings, military

floats, ore and shipping rafts, all drifting in an endless procession

across the arid wastes of the Red Desert. Army transports loaded

with armored troops advancing and retreating, converging through the

labyrinthian network of subsidiary canals to battle the capital itself.

And today the wonders of the past were on the verge of being repeated.

Engineers were struggling frantically to overcome the one problem that

so far had baffled them--the finding of a supply of _pxar_ sufficient

to rebuild the locks.

Ahead a lone Kiloto swooped out of the darkness into the span of light,

whirled frantically and missed the onrushing car by inches.

Presently a low rubble of masonry loomed before them. Hamilton Garth

tapped the I.P. man driver on the shoulder. "Way station," he said.

"Pull in there. We'll look for clues."

It was a forlorn spot. A few _pxar_ columns stood sentinel-like at the

entrance. A roofless plaisance stretched beyond. Here and there were

the remnants of crude hydro-dovolic mechanism chambers. Hamilton Garth

made a thorough examination of the place with his torch. The search was

fruitless, of course, and he stood up with a scowl.

"I suggest we split up and look around outside," he said. "Sloan, you

take the east side; Barker, take the right, and I'll go straight down

the canals for a ways. Mr. Starr, you'd better stay here, if you don't

mind."

It suited Jimmy. This was the place where he was scheduled to meet

Andromeda, and the sooner he could be alone, the better. Even now he

was tingling with excitement at the thought of unveiling the owner of

that hidden voice.

* * * * *

The two I.P. men and Garth shuffled off into the sand. Silence and the

loneliness of the Martian night closed in on Jimmy. He crossed to a

block of stone and slumped down on it wearily. From far off somewhere

the banshee scream of a prowler shattered the stillness. It died away,

came again, and then merged eerily into the wail of an Enzo-cat, the

two-headed carrion-eater of the desert. And then suddenly a voice

behind him said, "Don't look now, Jimmy, but a friend of yours is here."

He wheeled and brought up the electric torch as simultaneously a hand

grasped his.

"Not here, Jimmy. No light, please. Come, there's not a moment to lose."

A slender figure was partly visible in the gloom. A faint scent of

Martian _trofero_ touched his nostrils.

Before he could protest further he found himself guided out of the Way

Station and out into the sand. Presently a small two-seater tracto-car

rose up before them. There was no sign of Garth or the two I.P. men.

The girl leaped in, touched a stud, and the car trembled with life. Two

seconds later they were boring into the darkness.

"Can I look now?" Jimmy demanded.

Enter the Nebula · 第 3 / 7 题