Slowly enough the few hours passed before I found myself again in

Orton's office. He was there already, despite the orders of his

physician, who was disgusted at this excursion from the hospital.

Kennedy was there, too, grim and silent. We sat watching the two

indicators beside Orton's desk, which showed the air pressure in the

two tubes. The needles were vibrating ever so little and tracing a

red-ink line on the ruled paper that unwound from the drum. From the

moment the tunnels were started, here was preserved a faithful record

of every slightest variation of air pressure.

"Telephone down into the tube and have Capps come up," said Craig at

length, glancing at Orton's desk clock. "Taylor will be here pretty

soon, and I want Capps to be out of the tunnel by the time he comes.

Then get Shelton, too."

In response to Orton's summons Capps and Shelton came into the office,

just as a large town car pulled up outside the tunnel works. A tall,

distinguished-looking man stepped out and turned again toward the door

of the car.

"There's Taylor," I remarked, for I had seen him often at

investigations before the Public Service Commission.

"And Vivian, too," exclaimed Orton excitedly. "Say, fellows, clear off

these desks. Quick, before she gets up here. In the closet with these

blueprints, Walter. There, that's a little better. If I had known she

was coming I would at least have had the place swept out. Puff! look at

the dust on this desk of mine. Well, there's no help for it. There they

are at the door now. Why, ivian, what a surprise."

"Jack!" she exclaimed, almost ignoring the rest of us and quickly

crossing to his chair to lay a restraining hand on his shoulder as he

vainly tried to stand up to welcome her.

"Why didn't you tell me you were coming?" he asked eagerly. "I would

have had the place fixed up a bit."

"I prefer it this way," she said, looking curiously around at the

samples of tunnel paraphernalia and the charts and diagrams on the

walls.

"Yes, Orton," said President Taylor, "she would come--dropped in at the

office and when I tried to excuse myself for a business appointment,

demanded which way I was going. When I said I was coming here, she

insisted on coming, too."

Orton smiled. He knew that she had taken this simple and direct means

of being there, but he said nothing, and merely introduced us to the

president and Miss Taylor.

An awkward silence followed. Orton cleared his throat. "I think you all

know why we are here," he began. "We have been and are having

altogether too many accidents in the tunnel, too many cases of the

bends, too many deaths, too many delays to the work.

Well--er--I--er--Mr. Kennedy has something to say about them, I

believe."

No sound was heard save the vibration of the air-compressors and an

occasional shout of a workman at the shaft leading down to the

air-locks.

"There is no need for me to say anything about caisson disease to you,

gentlemen, or to you, Miss Taylor," began Kennedy. "I think you all

know how it is caused and a good deal about it already. But, to be

perfectly clear, I will say that there are five things that must, above

all others, be looked after in tunnel work: the air pressure, the

amount of carbon dioxide in the air, the length of the shifts which the

men work, the state of health of the men as near as physical

examination can determine it, and the rapidity with which the men come

out of the 'air,' so as to prevent carelessness which may cause the

bends.

"I find," he continued, "that the air pressure is not too high for

safety. Proper examinations for carbon dioxide are made, and the amount

in the air is not excessive. The shifts are not even as long as those

prescribed by the law. The medical inspection is quite adequate and as

for the time taken in coming out through the locks the rules are

stringent."

A look of relief crossed the face of Orton at this commendation of his

work, followed by a puzzled expression that plainly indicated that he

would like to know what was the matter, if all the crucial things were

all right.

"But," resumed Kennedy, "the bends are still hitting the men, and there

is no telling when a fire or a blow-out may occur in any of the eight

headings that are now being pushed under the river. Quite often the

work has been delayed and the tunnel partly or wholly flooded. Now, you

know the theory of the bends. It is that air--mostly the nitrogen in

the air--is absorbed by the blood under the pressure. In coming out of

the 'air' if the nitrogen is not all eliminated, it stays in the blood

and, as the pressure is reduced, it expands. It is just as if you take

a bottle of charged water and pull the cork suddenly. The gas rises in

big bubbles. Cork it again and the gas bubbles cease to rise and

finally disappear. If you make a pin-hole in the cork the gas will

escape slowly, without a bubble. You must decompress the human body

slowly, by stages, to let the super-saturated blood give up its

nitrogen to the lungs, which can eliminate it. Otherwise these bubbles

catch in the veins, and the result is severe pains, paralysis, and even

death. Gentlemen, I see that I am just wasting time telling you this,

for you know it all well. But consider."

Kennedy placed an empty corked flask on the table. The others regarded

it curiously, but I recalled having seen it in the tunnel.

"In this bottle," explained Kennedy, "I collected some of the air from

the tunnel when I was down there this morning. I have since analysed

it. The quantity of carbon dioxide is approximately what it should

be--not high enough of itself to cause trouble. But," he spoke slowly

to emphasise his words, "I found something else in that air beside

carbon dioxide."

"Nitrogen?" broke in Orton quickly, leaning forward.

"Of course; it is a constituent of air. But that is not what I mean."

"Then, for Heaven's sake, what did you find?" asked Orton.

"I found in this air," replied Kennedy, "a very peculiar mixture--an

explosive mixture."

"An explosive mixture?" echoed Orton.

"Yes, Jack, the blow-outs that you have had at the end of the tunnel

were not blow-outs at all, properly speaking. They were explosions."

We sat aghast at this revelation.

"And, furthermore," added Kennedy, "I should, if I were you, call back

all the men from the tunnel until the cause for the presence of this

explosive mixture is discovered and remedied."

Orton reached mechanically for the telephone to give the order, but

Taylor laid his hand on his arm. "One moment, Orton," he said. "Let's

hear Professor Kennedy out. He may be mistaken, and there is no use

frightening the men, until we are certain."

"Shelton," asked Kennedy, "what sort of flash oil is used to lubricate

the machinery?"

"It is three-hundred-and-sixty-degree Fahrenheit flash test," he

answered tersely.

"And are the pipes leading air down into the tunnel perfectly straight?"

"Straight?"

"Yes, straight--no joints, no pockets where oil, moisture, and gases

can collect."

"Straight as lines, Kennedy," he said with a sort of contemptuous

defiance.

They were facing each other coldly, sizing each other up. Like a

skilful lawyer, Kennedy dropped that point for a moment, to take up a

new line of attack.

"Capps," he demanded, turning suddenly, "why do you always call up on

the telephone and let some one know when you are going down in the

tunnel and when you are coming out?"

"I don't," replied Capps, quickly recovering his composure.

"Walter," said Craig to me quietly, "go out in the outer office. Behind

the telephone switchboard you will find a small box which you saw me

carry in there this morning and connect with the switchboard. Detach

the wires, as you saw me attach them, and bring it here."

No one moved, as I placed the box on a drafting-table before them.

Craig opened it. Inside he disclosed a large disc of thin steel, like

those used by some mechanical music-boxes, only without any

perforations. He connected the wires from the box to a sort of

megaphone. Then he started the disc revolving.

Out of the little megaphone horn, sticking up like a miniature

talking-machine, came a voice: "Number please. Four four three o,

Yorkville. Busy, I'll call you. Try them again, Central. Hello, hello,

Central--"

Kennedy stopped the machine. "It must be further along on the disc," he

remarked. "This, by the way, is an instrument known as the

telegraphone, invented by a Dane named Poulsen. It records

conversations over a telephone on this plain metal disc by means of

localised, minute electric charges."

Having adjusted the needle to another place on the disc he tried again.

"We have here a record of the entire day's conversations over the

telephone, preserved on this disc. I could wipe out the whole thing by

pulling a magnet across it, but, needless to say, I wouldn't do

that--yet. Listen."

This time it was Capps speaking. "Give me Mr. Shelton. Oh, Shelton, I'm

going down in the south tube with those men Orton has sent nosing

around here. I'll let you know when I start up again. Meanwhile--you

know--don't let anything happen while I am there. Good-bye."

Capps sat looking defiantly at Kennedy, as he stopped the telegraphone.

"Now," continued Kennedy suavely, "what COULD happen? I'll answer my

own question by telling what actually did happen. Oil that was smoky at

a lower point than its flash was being used in the machinery--not

really three-hundred-and-sixty-degree oil. The water-jacket had been

tampered with, too. More than that, there is a joint in the pipe

leading down into the tunnel, where explosive gases can collect. It is

a well-known fact in the use of compressed air that such a condition is

the best possible way to secure an explosion.

"It would all seem so natural, even if discovered," explained Kennedy

rapidly. "The smoking oil--smoking just as an automobile often does--is

passed into the compressed-air pipe. Condensed oil, moisture, and gases

collect in the joint, and perhaps they line the whole distance of the

pipe. A spark from the low-grade oil--and they are ignited. What takes

place is the same thing that occurs in the cylinder of an automobile

where the air is compressed with gasoline vapour. Only here we have

compressed air charged with vapour of oil. The flame proceeds down the

pipe--exploding through the pipe, if it happens to be not strong

enough. This pipe, however, is strong. Therefore, the flame in this

case shoots out at the open end of the pipe, down near the shield, and

if the air in the tunnel happens also to be surcharged with oil-vapour,

an explosion takes place in the tunnel--the river bottom is blown

out--then God help the sand-hogs!

"That's how your accidents took place, Orton," concluded Kennedy in

triumph, "and that impure air--not impure from carbon dioxide, but from

this oil-vapour mixture--increased the liability of the men for the

bends. Capps knew about it. He was careful while he was there to see

that the air was made as pure as possible under the circumstances. He

was so careful that he wouldn't even let Mr. Jameson smoke in the

tunnel. But as soon as he went to the surface, the same deadly mixture

was pumped down again--I caught some of it in this flask, and--"

"My God, Paddy's down there now," cried Orton, suddenly seizing his

telephone. "Operator, give me the south tube--quick--what--they don't

answer?"

Out in the river above the end of the heading, where a short time

before there had been only a few bubbles on the surface of the water, I

could see what looked like a huge geyser of water spouting up. I pulled

Craig over to me and pointed.

"A blow-out," cried Kennedy, as he rushed to the door, only to be met

by a group of blanched-faced workers who had come breathless to the

office to deliver the news.

Craig acted quickly. "Hold these men," he ordered, pointing to Capps

and Shelton, "until we come back. Orton, while we are gone, go over the

entire day's record on the telegraphone. I suspect you and Miss Taylor

will find something there that will interest you."

He sprang down the ladder to the tunnel air-lock, not waiting for the

elevator. In front of the closed door of the lock, an excited group of

men was gathered. One of them was peering through the dim, thick, glass

porthole in the door.

"There he is, standin' by the door with a club, an' the men's crowdin'

so fast that they're all wedged so's none can get in at all. He's

beatin' 'em back with the stick. Now, he's got the door clear and has

dragged one poor fellow in. It's Jimmy Rourke, him with the eight

childer. Now he's dragged in a Polack. Now he's fightin' back a big

Jamaica nigger who's tryin' to shove ahead of a little Italian."

"It's Paddy," cried Craig. "If he can bring them all out safely without

the loss of a life he'll save the day yet for Orton. And he'll do it,

too, Walter."

Instantly I reconstructed in my mind the scene in the tunnel--the

explosion of the oil-vapour, the mad race up the tube, perhaps the

failure of the emergency curtain to work, the frantic efforts of the

men, in panic, all to crowd through the narrow little door at once; the

rapidly rising water--and above all the heroic Paddy, cool to the last,

standing at the door and single-handed beating the men back with a

club, so that they could go through one at a time.

Only when the water had reached the level of the door of the lock, did

Paddy bang it shut as he dragged the last man in. Then followed an

interminable wait for the air in the lock to be exhausted. When, at

last, the door at our end of the lock swung open, the men with a cheer

seized Paddy and, in spite of his struggles, hoisted him on to their

shoulders, and carried him off, still struggling, in triumph up the

construction elevator to the open air above.

The scene in Orton's office was dramatic as the men entered with Paddy.

Vivian Taylor was standing defiantly, with burning eyes, facing Capps,

who stared sullenly at the floor before him. Shelton was plainly

abashed.

"Kennedy," cried Orton, vainly trying to rise, "listen. Have you still

that place on the telegraphone record, Vivian?"

Miss Taylor started the telegraphone, while we all crowded around

leaning forward eagerly.

"Hello. Inter-River? Is this the president's office? Oh, hello. This is

Capps talking. How are you? Oh, you've heard about Orton, have you? Not

so bad, eh? Well, I'm arranging with my man Shelton here for the final

act this afternoon. After that you can compromise with the Five-Borough

on your own terms. I think I have argued Taylor and Morris into the

right frame of mind for it, if we have one more big accident. What's

that? How is my love affair? Well, Orton's in the way yet, but you know

why I went into this deal. When you put me into his place after the

compromise, I think I will pull strong with her. Saw her last night.

She feels pretty bad about Orton, but she'll get over it. Besides, the

pater will never let her marry a man who's down and out. By the way,

you've got to do something handsome for Shelton. All right. I'll see

you to-night and tell you some more. Watch the papers in the meantime

for the grand finale. Good-bye."

An angry growl rose from one or two of the more quick-witted men.

Kennedy reached over and pulled me with him quickly through the crowd.

"Hurry, Walter," he whispered hoarsely, "hustle Shelton and Capps out

quick before the rest of the men wake up to what it's all about, or we

shall have a lynching instead of an arrest."

As we shoved and pushed them out, I saw the rough and grimy sand-hogs

in the rear move quickly aside, and off came their muddy, frayed hats.

A dainty figure flitted among them toward Orton. It was Vivian Taylor.

"Papa," she cried, grasping Jack by both hands and turning to Taylor,

who followed her closely, "Papa, I told you not to be too hasty with

Jack."

VII

THE WHITE SLAVE

Kennedy and I had just tossed a coin to decide whether it should be a

comic opera or a good walk in the mellow spring night air and the opera

had won, but we had scarcely begun to argue the vital point as to where

to go, when the door buzzer sounded--a sure sign that some box-office

had lost four dollars.

It was a much agitated middle-aged couple who entered as Craig threw

open the door. Of our two visitors, the woman attracted my attention

first, for on her pale face the lines of sorrow were almost visibly

deepening. Her nervous manner interested me greatly, though I took

pains to conceal the fact that I noticed it. It was quickly accounted

for, however, by the card which the man presented, bearing the name

"Mr. George Gilbert" and a short scribble from First Deputy O'Connor:

Mr. and Mrs. Gilbert desire to consult you with regard to the

mysterious disappearance of their daughter, Georgette. I am

sure I need say nothing further to interest you than that the

M. P. Squad is completely baffled.

O'CONNOR.

"H-m," remarked Kennedy; "not strange for the Missing Persons Squad to

be baffled--at least, at this case."

"Then you know of our daughter's strange--er--departure?" asked Mr.

Gilbert, eagerly scanning Kennedy's face and using a euphemism that

would fall less harshly on his wife's ears than the truth.

"Indeed, yes," nodded Craig with marked sympathy: "that is, I have read

most of what the papers have said. Let me introduce my friend, Mr.

Jameson. You recall we were discussing the Georgette Gilbert case this

morning, Walter?"

I did, and perhaps before I proceed further with the story I should

quote at least the important parts of the article in the morning Star

which had occasioned the discussion. The article had been headed, "When

Personalities Are Lost," and with the Gilbert case as a text many

instances had been cited which had later been solved by the return of

the memory of the sufferer. In part the article had said:

Mysterious disappearances, such as that of Georgette Gilbert, have

alarmed the public and baffled the police before this, disappearances

that in their suddenness, apparent lack of purpose, and

inexplicability, have had much in common with the case of Miss Gilbert.

Leaving out of account the class of disappearances such as embezzlers,

blackmailers, and other criminals, there is still a large number of

recorded cases where the subjects have dropped out of sight without

apparent cause or reason and have left behind them untarnished

reputations. Of these a small percentage are found to have met with

violence; others have been victims of a suicidal mania; and sooner or

later a clue has come to light, for the dead are often easier to find

than the living. Of the remaining small proportion there are on record

a number of carefully authenticated cases where the subjects have been

the victims of a sudden and complete loss of memory.

This dislocation of memory is a variety of aphasia known as amnesia,

and when the memory is recurrently lost and restored it is an

"alternating personality." The psychical researchers and psychologists

have reported many cases of alternating personality. Studious efforts

are being made to understand and to explain the strange type of mental

phenomena exhibited in these cases, but no one has as yet given a

final, clear, and comprehensive explanation of them. Such cases are by

no means always connected with disappearances, but the variety known as

the ambulatory type, where the patient suddenly loses all knowledge of

his own identity and of his past and takes himself off, leaving no

trace or clue, is the variety which the present case calls to popular

attention.

Then followed a list of a dozen or so interesting cases of persons who

had vanished completely and had, some several days and some even years

later, suddenly "awakened" to their first personality, returned, and

taken up the thread of that personality where it had been broken.

To Kennedy's inquiry I was about to reply that I recalled the

conversation distinctly, when Mr. Gilbert shot an inquiring glance from

beneath his bushy eyebrows, quickly shifting from my face to Kennedy's,

and asked, "And what was your conclusion--what do you think of the

case? Is it aphasia or amnesia, or whatever the doctors call it, and do

you think she is wandering about somewhere unable to recover her real

personality?"

"I should like to have all the facts at first hand before venturing an

opinion," Craig replied with precisely that shade of hesitancy that

might reassure the anxious father and mother, without raising a false

hope.

Mr. and Mrs. Gilbert exchanged glances, the purport of which was that

she desired him to tell the story.

"It was day before yesterday," began Mr. Gilbert, gently touching his

wife's trembling hand that sought his arm as he began rehearsing the

tragedy that had cast its shadow across their lives, "Thursday, that

Georgette--er--since we have heard of Georgette." His voice faltered a

bit, but he proceeded: "As you know, she was last seen walking on Fifth

Avenue. The police have traced her since she left home that morning. It

is known that she went first to the public library, then that she

stopped at a department store on the avenue, where she made a small

purchase which she had charged to our family account, and finally that

she went to a large book-store. Then--that is the last."

Mrs. Gilbert sighed, and buried her face in a lace handkerchief as her

shoulders shook convulsively.

"Yes, I have read that," repeated Kennedy gently, though with manifest

eagerness to get down to facts that might prove more illuminating. "I

think I need hardly impress upon you the advantage of complete

frankness, the fact that anything you may tell me is of a much more

confidential nature than if it were told to the police. Er--r, had Miss

Gilbert any--love affair, any trouble of such a nature that it might

have preyed on her mind?"

Kennedy's tactful manner seemed to reassure both the father and the

mother, who exchanged another glance.

"Although we have said no to the reporters," Mrs. Gilbert replied

bravely in answer to the nod of approval from her husband, and much as

if she herself were making a confession for them both, "I fear that

Georgette had had a love affair. No doubt you have heard hints of

Dudley Lawton's name in connection with the case? I can't imagine how

they could have leaked out, for I should have said that that old affair

had long since been forgotten even by the society gossips. The fact is

that shortly after Georgette 'came out,' Dudley Lawton, who is quite on

the road to becoming one of the rather notorious members of the younger

set, began to pay her marked attentions. He is a fascinating, romantic

sort of fellow, one that, I imagine, possesses much attraction for a

girl who has been brought up as simply as Georgette was, and who has

absorbed a surreptitious diet of modern literature such as we now know

Georgette did. I suppose you have seen portraits of Georgette in the

newspapers and know what a dreamy and artistic nature her face

indicates?"

Kennedy nodded. It is, of course, one of the cardinal tenets of

journalism that all women are beautiful, but even the coarse screen of

the ordinary newspaper half-tone had not been able to conceal the

rather exceptional beauty of Miss Georgette Gilbert. If it had, all the

shortcomings of the newspaper photographic art would have been quickly

glossed over by the almost ardent descriptions by those ladies of the

press who come along about the second day after an event of this kind

with signed articles analysing the character and motives, the life and

gowns of the latest actors in the front-page stories.

"Naturally both my husband and myself opposed his attentions from the

first. It was a hard struggle, for Georgette, of course, assumed the

much-injured air of some of the heroines of her favourite novels. But

I, at least, believed that we had won and that Georgette finally was

brought to respect and, I hoped, understand our wishes in the matter. I

believe so yet. Mr. Gilbert in a roundabout way came to an

understanding with old Mr. Dudley Lawton, who possesses a great

influence over his son, and--well, Dudley Lawton seemed to have passed

out of Georgette's life. I believed so then, at least, and I see no

reason for not believing so yet. I feel that you ought to know this,

but really I don't think it is right to say that Georgette had a love

affair. I should rather say that she had HAD a love affair, but that it

had been forgotten, perhaps a year ago."

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