CHAPTER XVI.

The Lost Poisons

(Tuesday, November 30; 2 p. m.)

Markham and Vance and I had a late lunch at the Stuyvesant Club.

During the meal the subject of the murder was avoided as if by tacit

agreement; but when we sat smoking over our coffee Markham settled

back in his chair and surveyed Vance sternly.

“Now,” he said, “I want to hear how you came to find those galoshes in

the linen-closet. And, damn it! I don’t want any garrulous evasions or

quotations out of Bartlett.”

“I’m quite willing to unburden my soul,” smiled Vance. “It was all so

dashed simple. I never put any stock in the burglar theory, and so was

able to approach the problem with a virgin mind, as it were.”

He lit a fresh cigarette and poured himself another cup of coffee.

“Perpend, Markham. On the night that Julia and Ada were shot a double

set of footprints was found. It had stopped snowing at about eleven

o’clock, and the tracks had been made between that hour and midnight,

when the Sergeant arrived on the scene. On the night of Chester’s

murder there was another set of footprints similar to the others; and

they too had been made shortly after the weather had cleared. Here,

then, were tracks in the snow, approaching and retreating from the

front door, preceding each crime; and both sets had been made after

the snow had stopped falling _when they would be distinctly visible

and determinable_. This was not a particularly striking coincidence,

but it was sufficiently arresting to create a slight strain on my

_cortex cerebri_. And the strain increased perceptibly this morning

when Snitkin reported his discovery of fresh footprints on the balcony

steps; for once again the same meteorological conditions had

accompanied our culprit’s passion for leaving spoors. I was therefore

driven to the irresistible inference, as you learned Solons put it,

that the murderer, so careful and calculating about everything else,

had deliberately made all these footprints for our special

edification. In each instance, d’ ye see, he had chosen the only hour

of the day when his tracks would not be obliterated by falling snow or

confused with other tracks. . . . Are you there?”

“Go ahead,” said Markham. “I’m listening.”

“To proceed, then. Another coincidence attached to these three sets of

footprints. It was impossible, because of the dry, flaky nature of the

snow, to determine whether the first set had originated in the house

and returned there, or had first approached the house from the street

and then retreated. Again, on the night of Chester’s demise, when the

snow was damp and susceptible to clear impressions, the same doubt

arose. The tracks to and from the house were on opposite sides of the

front walk: not a single footstep overlapped! Accidental? Perhaps. But

not wholly reasonable. A person walking to and from a door along a

comparatively narrow pathway would almost certainly have doubled on

some of his tracks. And even if he had failed to superimpose any of

his footprints, the parallel spoors would have been close together.

But these two lines of prints were far apart: each clung to the

extreme edge of the walk, as if the person who made them was

positively afraid of overlapping. Now, consider the footprints made

this morning. There was a single line of them entering the house, but

none coming out. We concluded that the murderer had made his escape

_via_ the front door and down the neatly swept walk; but this, after

all, was only an assumption.”

Vance sipped his coffee and inhaled a moment on his cigarette.

“The point I’m trying to bring out is this: there is no proof whatever

that all these footprints were not made by some one in the house who

first went out and then returned for the express purpose of leading

the police to believe that an outsider was guilty. And, on the other

hand, there is evidence that the footprints actually did originate in

the house; because if an outsider had made them he would have been at

no pains to confuse the issue of their origin, since, in any event,

they could not have been traced back farther than the street.

Therefore, as a tentative starting-point, I assumed that the tracks

had, in reality, been made by some one in the house.—I can’t say, of

course, whether or not my layman’s logic adds lustre to the gladsome

light of jurisprudence——”

“Your reasoning is consistent as far as it goes,” cut in Markham

tartly. “But it is hardly complete enough to have led you directly to

the linen-closet this morning.”

“True. But there were various contribut’ry factors. For instance, the

galoshes which Snitkin found in Chester’s clothes-closet were the

exact size of the prints. At first I toyed with the idea that they

were the actual instruments of our unknown’s vestigial deception. But

when, after they had been taken to Headquarters, another set of

similar tracks appeared—to wit, the ones found this morning—I amended

my theory slightly, and concluded that Chester had owned two pairs of

galoshes—one that had perhaps been discarded but not thrown away. That

was why I wanted to wait for Captain Jerym’s report: I was anxious to

learn if the new tracks were exactly like the old ones.”

“But even so,” interrupted Markham, “your theory that the footprints

emanated from the house strikes me as being erected on pretty weak

scaffolding. Were there any other indicants?”

“I was coming to them,” replied Vance reproachfully. “But you _will_

rush me so. Pretend that I’m a lawyer, and my summation will sound

positively breathless.”

“I’m more likely to pretend that I’m a presiding judge, and give you

_sus. per coll._”

“Ah, well.” Vance sighed and continued. “Let us consider the

hypothetical intruder’s means of escape after the shooting of Julia

and Ada. Sproot came into the upper hall immediately after the shot

had been fired in Ada’s room; yet he heard nothing—neither footsteps

in the hall nor the front door closing. And, Markham old thing, a

person in galoshes going down marble steps in the dark is no midsummer

zephyr for silence. In the circumstances Sproot would have been

certain to hear him making his escape. Therefore, the explanation that

suggested itself to me was that _he did not make his escape_.”

“And the footprints outside?”

“Were made beforehand by some one walking to the front gate and

back.—And that brings me to the night of Chester’s murder. You

remember Rex’s tale of hearing a dragging noise in the hall and a door

closing about fifteen minutes before the shot was fired, and Ada’s

corroboration of the door-shutting part of the story? The noise,

please note, was heard after it had stopped snowing—in fact, after the

moon had come out. Could the noise not easily have been a person

walking in galoshes, or even taking them off, after having returned

from making those separated tracks to and from the gate? And might not

that closing door have been the door of the linen-closet where the

galoshes were being temporarily cached?”

Markham nodded. “Yes, the sounds Rex and Ada heard might be explained

that way.”

“And this morning’s business was even plainer. There were footprints

on the balcony steps, made between nine o’clock and noon. But neither

of the guards saw any one enter the grounds. Moreover, Sproot waited a

few moments in the dining-room after the shot had been fired in Rex’s

room; and if any one had come down the stairs and gone out the front

door Sproot would certainly have heard him. It’s true that the

murderer might have descended the front stairs as Sproot went up the

servants’ stairs. But is that likely? Would he have waited in the

upper hall after killing Rex, knowing that some one was likely to step

out and discover him? I think not. And anyway, the guards saw no one

leave the estate. _Ergo_, I concluded that _no one came down the front

stairs after Rex’s death_. I assumed again that the footprints had

been made at some earlier hour. This time, however, the murderer did

not go to the gate and return, for a guard was there who would have

seen him; and, furthermore, the front steps and the walk had been

swept. So our track-maker, after having donned the galoshes, stepped

out of the front door, walked round the corner of the house, mounted

the balcony steps, and re-entered the upper hall by way of Ada’s

room.”

“I see.” Markham leaned over and knocked the ashes from his cigar.

“Therefore, you inferred that the galoshes were still in the house.”

“Exactly. But I’ll admit I didn’t think of the linen-closet at once.

First I tried Chester’s room. Then I took a look round Julia’s

chamber; and I was about to go up to the servants’ quarters when I

recalled Rex’s story of the closing door. I ran my eye over all the

second-story doors, and straightway tried the linen-closet—which was,

after all, the most likely place for a transient occultation. And lo!

there were the galoshes tucked under an old drugget. The murderer had

probably hidden them there both times before, pending an opportunity

of secreting them more thoroughly.”

“But where could they have been concealed so that our searchers didn’t

run across them?”

“As to that, now, I couldn’t say. They may have been taken out of the

house altogether.”

There was a silence for several minutes. Then Markham spoke.

“The finding of the galoshes pretty well proves your theory, Vance.

But do you realize what confronts us now? If your reasoning is

correct, the guilty person is some one with whom we’ve been talking

this morning. It’s an appalling thought. I’ve gone over in my mind

every member of that household; and I simply can’t regard any one of

them as a potential mass-murderer.”

“Sheer moral prejudice, old dear.” Vance’s voice assumed a note of

raillery. “I’m a bit cynical myself, and the only person at the Greene

mansion I’d eliminate as a possibility would be Frau Mannheim. She’s

not sufficiently imaginative to have planned this accumulative

massacre. But as regards the others, I could picture any one of ’em as

being at the bottom of this diabolical slaughter. It’s a mistaken

idea, don’t y’ know, to imagine that a murderer looks like a murderer.

No murderer ever does. The only people who really look like murderers

are quite harmless. Do you recall the mild and handsome features of

the Reverend Richeson of Cambridge? Yet he gave his inamorata cyanide

of potassium. The fact that Major Armstrong was a meek and gentlemanly

looking chap did not deter him from feeding arsenic to his wife.

Professor Webster of Harvard was not a criminal type; but the

dismembered spirit of Doctor Parkman doubtless regards him as a brutal

slayer. Doctor Lamson, with his philanthropic eyes and his benevolent

beard, was highly regarded as a humanitarian; but he administered

aconitine rather cold-bloodedly to his crippled brother-in-law. Then

there was Doctor Neil Cream, who might easily have been mistaken for

the deacon of a fashionable church; and the soft-spoken and amiable

Doctor Waite. . . . And the women! Edith Thompson admitted putting

powdered glass in her husband’s gruel, though she looked like a pious

Sunday-school teacher. Madeleine Smith certainly had a most

respectable countenance. And Constance Kent was rather a beauty—a nice

girl with an engaging air; yet she cut her little brother’s throat in

a thoroughly brutal manner. Gabrielle Bompard and Marie Boyer were

anything but typical of the _donna delinquente_; but the one strangled

her lover with the cord of her dressing-gown, and the other killed her

mother with a cheese-knife. And what of Madame Fenayrou——?”

“Enough!” protested Markham. “Your lecture on criminal physiognomy can

go over a while. Just now I’m trying to adjust my mind to the

staggering inferences to be drawn from your finding of those

galoshes.” A sense of horror seemed to weigh him down. “Good God,

Vance! There must be some way out of this nightmare you’ve propounded.

What member of that household could possibly have walked in on Rex

Greene and shot him down in broad daylight?”

“’Pon my soul, I don’t know.” Vance himself was deeply affected by the

sinister aspects of the case. “But some one in that house did it—some

one the others don’t suspect.”

“That look on Julia’s face, and Chester’s amazed expression—that’s

what you mean, isn’t it? They didn’t suspect either. And they were

horrified at the revelation—when it was too late. Yes, all those

things fit in with your theory.”

“But there’s one thing that doesn’t fit, old man.” Vance gazed at the

table perplexedly. “Rex died peacefully, apparently unaware of his

murderer. Why wasn’t there also a look of horror on his face? His eyes

couldn’t have been shut when the revolver was levelled at him, for he

was standing, facing the intruder. It’s inexplicable—mad!”

He beat a nervous tattoo on the table, his brows contracted.

“And there’s another thing, Markham, that’s incomprehensible about

Rex’s death. His door into the hall was open; but nobody up-stairs

heard the shot—nobody _up-stairs_. And yet Sproot—who was down-stairs,

in the butler’s pantry behind the dining-room—heard it distinctly.”

“It probably just happened that way,” Markham argued, almost

automatically. “Sound acts fantastically sometimes.”

Vance shook his head.

“Nothing has ‘just happened’ in this case. There’s a terrible logic

about everything—a carefully planned reason behind each detail.

Nothing has been left to chance. Still, this very systematization of

the crime will eventually prove the murderer’s downfall. When we can

find a key to any one of the anterooms, we’ll know our way into the

main chamber of horrors.”

At that moment Markham was summoned to the telephone. When he returned

his expression was puzzled and uneasy.

“It was Swacker. Von Blon is at my office now—he has something to tell

me.”

“Ah! Very interestin’,” commented Vance.

We drove to the District Attorney’s office, and Von Blon was shown in

at once.

“I may be stirring up a mare’s nest,” he began apologetically, after

he had seated himself on the edge of a chair. “But I felt I ought to

inform you of a curious thing that happened to me this morning. At

first I thought I would tell the police, but it occurred to me they

might misunderstand; and I decided to place the matter before you to

act upon as you saw fit.”

Plainly he was uncertain as to how the subject should be broached, and

Markham waited patiently with an air of polite indulgence.

“I phoned the Greene house as soon as I made the—ah—discovery,” Von

Blon went on hesitantly. “But I was informed you had left for the

office; so, as soon as I had lunched, I came directly here.”

“Very good of you, doctor,” murmured Markham.

Again Von Blon hesitated, and his manner became exaggeratedly

ingratiating.

“The fact is, Mr. Markham, I am in the habit of carrying a rather full

supply of emergency drugs in my medicine-case. . . .”

“Emergency drugs?”

“Strychnine, morphine, caffeine, and a variety of hypnotics and

stimulants. I find it often convenient——”

“And it was in connection with these drugs you wished to see me?”

“Indirectly—yes.” Von Blon paused momentarily to arrange his words.

“To-day it happened that I had in my case a fresh tube of soluble

quarter-grain morphine tablets, and a Parke-Davis carton of four tubes

of strychnine—thirtieths. . . .”

“And what about this supply of drugs, doctor?”

“The fact is, the morphine and the strychnine have disappeared.”

Markham bent forward, his eyes curiously animated.

“They were in my case this morning when I left my office,” Von Blon

explained; “and I made only two brief calls before I went to the

Greenes’. I missed the tubes when I returned to my office.”

Markham studied the doctor a moment.

“And you think it improbable that the drugs were taken from your case

during either of your other calls?”

“That’s just it. At neither place was the case out of my sight for a

moment.”

“And at the Greenes’?” Markham’s agitation was growing rapidly.

“I went directly to Mrs. Greene’s room, taking the case with me. I

remained there for perhaps half an hour. When I came out——”

“You did not leave the room during that half-hour?”

“No. . . .”

“Pardon me, doctor,” came Vance’s indolent voice; “but the nurse

mentioned that you called to her to bring Mrs. Greene’s bouillon. From

where did you call?”

Von Blon nodded. “Ah, yes. I did speak to Miss Craven. I stepped to

the door and called up the servants’ stairs.”

“Quite so. And then?”

“I waited with Mrs. Greene until the nurse came. Then I went across

the hall to Sibella’s room.”

“And your case?” interjected Markham.

“I set it down in the hall, against the rear railing of the main

stairway.”

“And you remained in Miss Sibella’s room until Sproot called you?”

“That is right.”

“Then the case was unguarded in the rear of the upper hall from about

eleven until you left the house?”

“Yes. After I had taken leave of you gentlemen in the drawing-room I

went up-stairs and got it.”

“And also made your adieus to Miss Sibella,” added Vance.

Von Blon raised his eyebrows with an air of gentle surprise.

“Naturally.”

“What amount of these drugs disappeared?” asked Markham.

“The four tubes of strychnine contained in all approximately three

grains—three and one-third, to be exact. And there are twenty-five

tablets of morphine in a Parke-Davis tube, making six and one-quarter

grains.”

“Are those fatal doses, doctor?”

“That’s a difficult question to answer, sir.” Von Blon adopted a

professorial manner. “One may have a tolerance for morphine and be

capable of assimilating astonishingly large doses. But, _ceteris

paribus_, six grains would certainly prove fatal. Regarding

strychnine, toxicology gives us a very wide range as to lethal dosage,

depending on the condition and age of the patient. The average fatal

dose for an adult is, I should say, two grains, though death has

resulted from administrations of one grain, or even less. And, on the

other hand, recovery has taken place after as much as ten grains have

been swallowed. Generally speaking, however, three and one-third

grains would be sufficient to produce fatal results.”

When Von Blon had gone Markham gazed at Vance anxiously.

“What do you make of it?” he asked.

“I don’t like it—I don’t at all like it.” Vance shook his head

despairingly. “It’s dashed queer—the whole thing. And the doctor is

worried, too. There’s a panic raging beneath his elegant façade. He’s

in a blue funk—and it’s not because of the loss of his pills. He fears

something, Markham. There was a strained, hunted look in his eyes.”

“Doesn’t it strike you as strange that he should be carrying such

quantities of drugs about with him?”

“Not necessarily. Some doctors do it. The Continental M.D.s especially

are addicted to the practice. And don’t forget Von Blon is

German-trained. . . .” Vance glanced up suddenly. “By the by, what

about those two wills?”

There was a look of astonished interrogation in Markham’s incisive

stare, but he said merely:

“I’ll have them later this afternoon. Buckway has been laid up with a

cold, but he promised to send me copies to-day.”

Vance got to his feet.

“I’m no Chaldean,” he drawled; “but I have an idea those two wills may

help us to understand the disappearance of the doctor’s pellets.” He

drew on his coat and took up his hat and stick. “And now I’m going to

banish this beastly affair from my thoughts.—Come, Van. There’s some

good chamber-music at Æolian Hall this afternoon, and if we hurry

we’ll be in time for the Mozart ‘_C-major_.’”

The Greene murder case · 第 16 / 26 章