"His mind totters," I said hoarsely.
"What's that!" cried Quint, struggling to get off the chair whither I had
pushed him: but with my handkerchief we tied his ankles to the rung of
the chair, heedless of his attempts to kick us, and sprang back out of
range.
"Now," I said, "what have you done with the poor victim of your fury?
Where is he? Where is all that remains of Professor Boomly?"
"Boomly? I don't know where he is. How the devil should I know?"
"Don't lie," I said solemnly.
"Lie! See here, Smith, when I get out of this chair I'll settle you,
too--"
"Quint! There is another and more terrible chair which awaits such
criminals as you!"
"You old fluff!" he shouted. "I'll knock your head off, too. Do you
understand? I'll attend to you as I attended to Boomly--"
"Assassin!" I retorted calmly. "Only an alienist can save you now. In
this awful moment--"
A light touch on my arm interrupted me, and, a trifle irritated, as any
man might be when checked in the full flow of eloquence, I turned to find
Mildred at my elbow.
"Let me talk to him," she said in a quiet voice. "Perhaps I may not
irritate him as you seem to."
"Very well," I said. "Jones and I are here as witnesses." And I folded my
arms in an attitude not, perhaps, unpicturesque.
"Dr. Quint," said Mildred in her soft, agreeable voice, and actually
smiling slightly at the self-confessed murderer, "is it really true that
you are guilty of shedding the blood of Professor Boomly?"
"It is," said Quint, coolly.
She seemed rather taken aback at that, but presently recovered her
equanimity.
"Why?" she asked gently.
"Because he attempted a most hellish crime!" yelled Quint.
"W-what crime?" she asked faintly.
"I'll tell you. He wanted the Carnegie medal, and he knew it would be
given to me if I could incubate and hatch my batch of Silver Moon
butterfly eggs. He realised well enough that his Heliconian eggs were not
as valuable as my Silver Moon eggs. So first he sneaked in here and put
an ichneumon fly in my breeding-cage. And next he stole the Silver Moon
eggs and left in their place some common _Plexippus_ eggs, thinking that
because they were very similar I would not notice the substitution.
"I did notice it! I charged him with that cataclysmic outrage. He
laughed. We came into personal collision. He chased me into my room."
Panting, breathless with rage at the memory of the morning's defeat which
I had witnessed, Quint glared at me for a moment. Then he jerked his head
toward Mildred:
"As soon as he went to luncheon--Boomly, I mean--I climbed over that
transom and dropped into this room. I had been hunting for ten minutes
before I found my Silver Moon eggs hidden under the carpet. So I pocketed
them, climbed back over the transom, and went to my room."
He paused dramatically, staring from one to another of us:
"Boomly was there!" he said slowly.
"Where?" asked Mildred with a shudder.
"In my room. He had picked the lock. I told him to get out! He went.
I shouted after him that I had recovered the Silver Moon eggs and that
I should certainly be awarded the Carnegie medal.
"Then that monster in human form laughed a horrible laugh, avowing
himself guilty of a crime still more hideous than the theft of the Silver
Moon eggs! Do you know what he had done?"
"W-what?" faltered Mildred.
"He had stolen from cold storage and had concealed the leaves of the
Bimba bush, brought from Singapore to feed the Silver Moon caterpillars!
_That's_ what Boomly had done!
_"And my Silver Moon eggs had already begun to hatch!!! And my
caterpillars would starve!!!!"_
His voice ended in a yell; he struggled on his chair until it nearly
upset.
"You lunatic!" I shouted. "Was that a reason for spilling the blood of a
human being!"
"It was reason enough for me!"
"Madman!"
"Let me loose! He's hidden those leaves somewhere or other! I've torn
this place to pieces looking for them. I've got to find them, I tell
you--"
Mildred went to the infuriated entomologist and laid a firm hand on his
shoulder:
"Listen," she said: "how do you know that Professor Boomly has not
concealed these Bimba leaves on his own person?"
Quint ceased his contortions and gaped at her.
"I never thought of that," he said.
"What have you done with him?" she asked, very pale.
"I tell you, I don't know."
"You must know what you did with him," she insisted.
Quint shook his head impatiently, apparently preoccupied with other
thoughts. We stood watching him in silence until he looked up and became
conscious of our concentrated gaze.
"My caterpillars are starving," he began violently. "I haven't anything
else they'll eat. They feed only on the Bimba leaf. They _won't_ eat
anything else. It's a well-known fact that they won't. Why, in Johore,
where they came from, they'll travel miles over the ground to find a
Bimba bush--"
"What!" exclaimed Mildred.
"Certainly--miles! They'd starve sooner than eat anything except Bimba
leaves. If there's a bush within twenty miles they'll find it--"
"Wait," said Mildred quietly. "Where are these starving caterpillars?"
"In a glass jar in my pocket--here! What the devil are you doing!" For
the girl had dexterously slipped the glass jar from his coat pocket and
was holding it up to the light.
Inside it were several dozen tiny, dark caterpillars, some resting
disconsolately on the sides of the glass, some hungrily travelling over
the bottom in pitiful and hopeless quest of nourishment.
Heedless of the shouts and threats of Dr. Quint, the girl calmly uncorked
the jar, took on her slender forefinger a single little caterpillar,
replaced the cork, and, kneeling down, gently disengaged the caterpillar.
It dropped upon the floor, remained motionless for a moment, then,
turning, began to travel rapidly toward the doorway behind us.
"Now," she said, "if poor Professor Boomly really has concealed these
Bimba leaves upon his own person, this little caterpillar, according to
Dr. Quint, is certain to find those leaves."
[Illustration: "'This little caterpillar ... is certain to find those
leaves.'"]
Overcome with excitement and admiration for this intelligent and
unusually beautiful girl, I seized her hands and congratulated her.
"Murder," said I to the miserable Quint, "will out! This infant
caterpillar shall lead us to that dark and secret spot where you had
hoped to conceal the horrid evidence of your guilt. Three things have
undone you--a caterpillar replete with mysterious instinct, a humble
bunch of Bimba leaves, and the marvellous intelligence of this young and
lovely girl. Madman, your hour has struck!"
He looked at me in a dazed sort of way, as though astonishment had left
him unable to articulate. But I had become tired of his violence and
his shouts and yells; so I asked Jones for his handkerchief, and, before
Quint knew what I was up to I had tied it over his mouth.
He became a brilliant purple, but all he could utter was a furious
humming, buzzing noise.
Meanwhile, Jones had opened the door; the little caterpillar, followed by
Mildred and myself, continued to hustle along as though he knew quite
well where he was going.
Down the hallway he went in undulating haste, past my door, we all
following in silent excitement as we discovered that, parallel to the
caterpillar's course, ran a gruesome trail of blood drops.
And when the little creature turned and made straight for the door
of Professor Farrago, our revered chief, the excitement among us was
terrific.
The caterpillar halted; I gently tried the door; it was open.
Instantly the caterpillar crossed the threshold, wriggling forward at top
speed. We followed, peering fearfully around us. Nobody was visible.
Could Quint have dragged his victim here? By Heaven, he had! For the
caterpillar was travelling straight under the lounge upon which Professor
Farrago was accustomed to repose after luncheon, and, dropping on one
knee, I saw a fat foot partly protruding from under the shirred edges of
the fringed drapery.
"He's there!" I whispered, in an awed voice to the others.
"Courage, Miss Case! Try not to faint."
Jones turned and looked at her with that same odd expression; then he
went over to where she stood and coolly passed one arm around her waist.
"Try not to faint, Mildred," he said. "It might muss your hair."
It was a strange thing to say, but I had no time then to analyze it, for
I had seized the fat foot which partly protruded from under the sofa,
clad in a low-cut congress gaiter and a white sock.
And then _I_ nearly fainted, for instead of the dreadful, inert
resistance of lifeless clay, the foot wriggled and tried to kick at me.
"Help!" came a thin but muffled voice. "Help! Help, in the name of
Heaven!"
"Boomly!" I cried, scarcely believing my ears.
"Take that man away, Smith!" whimpered Boomly. "He's a devil! He'll
murder me! He made my nose bleed all over everything!"
"Boomly! You're _not_ dead!"
"Yes, I am!" he whined. "I'm dead enough to suit me. Keep that little
lunatic off--that's all I ask. He can have his Carnegie medal for all
I care, only tie him up somewhere--"
"Professor Boomly!" cried Mildred excitedly. "Have you any Bimba leaves
concealed about your person?"
"Yes, I have," he said sulkily. There came a hitch of the fat foot, a
heavy scuffling sound, heavy panting, and then, skittering out across the
floor came a flat, sealed parcel.
"There you are," he said; "now, let me alone until that fiend has gone
home."
"He won't attack you again," I said. "Come out."
But Professor Boomly flatly declined to stir.