Chapter 10

I had heard of these weird drugs, but they had always seemed to be so far away and to belong rather to the atmosphere of civilizations different from New York. Yet, I reflected, what was to prevent the appearance of anything in such a cosmopolitan city, especially in a case so unusual as that which had so far baffled even Kennedy's skill?

"You know the jimson weed--the Jamestown weed, as it is so often called?" he continued, explaining. "It grows almost everywhere in the world, but most thrivingly in the tropics. All the poisons that I have mentioned are related to it in some way, I believe."

"I've seen the thing in lots and fields," I replied, "but I never thought it was of much importance."

"Well," he resumed, "the jimson weed on the Pacific coast, in some parts of the Andes, has large white flowers which exhale a faint, repulsive odour. It is a harmless-looking plant, with its thick tangle of leaves, a coarse green growth, with trumpet-shaped flowers. But to one who knows its properties it is quite too dangerously convenient for safety."

"But what has that to do with the evil eye?" I asked.

"Nothing; but it has much to do with the cigarettes that Whitney is smoking," he went on positively. "Those cigarettes have been doped!"

"Doped?" I interrogated, in surprise. "With this weed of madness, as you call it?"

"No, it isn't toloache that was used," he corrected. "I think it must be some particularly virulent variety of the jimson weed that was used, though that same weed in Mexico is, I am sure, what there they call toloache. Perhaps its virulence in this case lies in the method of concentration in preparing it. For instance, the seeds of the stramonium, which is the same thing, contain a much higher percentage of poison than the leaves and flowers. Perhaps the seeds were used. I can't say. But, then, that isn't at all necessary. It is the fact of its use that concerns us most now."

He took a drop of the liquid which he had isolated and added a drop of nitric acid. Then he evaporated it by gentle heat and it left a residue slightly yellow.

Next he took from the shelf over his table a bottle marked "Alcoholic Solution--Potassium Hydrate." He opened it and let a drop fall on the place where the liquid had evaporated.

Instantly the residue became a beautiful purple, turning rapidly to violet, then to dark red, and, finally, it disappeared altogether.

"Stramonium, all right," he nodded, with satisfaction at the achievement of his night's labours. "That was known as Vitali's test. Yes, there was stramonium in those cigarettes--datura stramonium--perhaps a trace of hyoscyamine."

I tried to look wise, but all I could think of was that, whatever his science showed me now, my instinct had been enough to prompt me not to smoke those cigarettes, though, of course, only Kennedy's science could tell what it was that caused that instinctive aversion.

"They are all like atropine, mydriatic alkaloids," he proceeded, "so called from the effect they have on the eye. Why, one-one hundred thousandth of a grain will affect the eye of a cat. You saw how it acted on our subject. It is more active in that way than atropine. Better yet, you remember how Whitney's eyes looked, how Inez said her father stared, and how she feared for Lockwood?"

"I remember," I said, still not able to detach the evil-eye idea quite from my mind. "How about the Senora's eyes? What makes them so--well, effective?"

"Oh," Craig answered quickly, "her pupils were normal enough. Didn't you notice that? It was the difference in Whitney's and the others' that first suggested making some tests."

"What is the effect?" I asked, wondering whether it might have contributed to the cause of Mendoza's death.

"The concentrated poison which has been used in these cigarettes does not kill--at least not outright. It is worse than that. Slowly it accumulates in the system. It acts on the brain."

I was listening, spellbound, as he made his disclosure. No wonder, I thought, even a scientific criminal stood in awe of Craig.

"Of all the dangers to be met with in superstitious countries, these mydratic alkaloids are among the worst. They offer a chance for crimes of the most fiendish nature--worse than with the gun or the stiletto. They are worse because there is so little fear of detection. That crime is the production of insanity!"

Horrible though the idea, and repulsive, I could not doubt it in the face of Craig's investigations and what I had already seen with my own eyes. In fact, it was necessary for me only to recall the mild sensations I myself had experienced, in order to be convinced of the possible effect intended by the insidious poison contained in the many cigarettes which Whitney, for instance, had smoked.

"But don't you suppose they know it?" I wondered. "Can't they tell it?"

"I suppose they have gradually become accustomed to it," Craig ventured. "If you have ever smoked one particular brand of cigarette you must have noticed how the manufacturer can gradually substitute a cheaper grade of tobacco without any large number of his patrons knowing anything about it. I imagine it might have been done in some way like that."

"But you would think they'd feel the effect and attribute it to smoking."

"Perhaps they do feel the effect. But when it comes to tracing causes, some people are loath to admit that tobacco and liquor can be the root of the evil. No, some one is slipping these cigarettes in on them, perhaps substituting the doped brand for those that are ordered. If you will notice, both Whitney and Lockwood have cigarettes that are made especially for them. So had Mendoza. It is a circumstance which some one has turned to account, though how and by whom the substitution has been made I cannot say yet. I wish I had time to follow out this one line, to the exclusion of everything else. But I've got to keep my fingers on every rope at once, else the thing will pull away from me. It is enough for the present that we know what the poison is. I shall take up the tracing of the person who is administering it the moment I get a hint."

It was almost daylight before Craig and I left the laboratory after his discovery of the manner of the cigarette poisoning by stramonium. But that was the only way in which he was able to make progress--taking time for each separate point by main force.

I was thoroughly tired, though not so much so that my dreams were not haunted by a succession of baleful eyes peering at me from the darkness.

I slept late, but was awakened by a knocking on the door. As I rose to answer it I saw through the open door of Kennedy's room that he had been about early and must already be at the laboratory. How he did it I don't know. My own newspaper experience had made me considerable of a nighthawk. But I always paid for it by sleeping the next day. With Kennedy, when he was on a case, even five hours of sleep was more than he seemed able to stand.

"Hello, Jameson," greeted a voice, as I opened the door. "Is Kennedy in--oh, he hasn't come back yet?"

It was Lockwood, at first eager to see Craig, then naturally crestfallen because he saw that he was not there.

"Yes," I replied, rubbing my eyes. "He must be at the laboratory. If you'll wait a minute while I slip on my clothes, I'll walk over there with you."

While I completed my hasty toilet, Lockwood sat in our living room, gazing about with fascination at the collection of trophies of the chase of criminals.

"This is positively a terrifying array of material, Jameson," he declared, as at last I emerged. "Between what Kennedy has here and what he has stowed away in that laboratory of his, I wonder that any one dares be a crook."

I could not help eying him keenly. Could he have spoken so heartily if he had known what it was, damning to himself, that Kennedy had tucked away in the laboratory? If he knew, he must have been a splendid actor, one of those whom only the minute blood-pressure test of the sphygmograph could induce to give up a secret, and then only in spite of himself.

"It is wonderful," I agreed. "Are you ready?"

We left the apartment and walked along in the bracing morning air toward the campus and the Chemistry Building. Sure enough, as I had expected, Kennedy was in his laboratory.

As we entered he was verifying his experiments and checking over his results, carefully endeavouring to isolate any of the other closely related mydriatic alkaloids that might be contained in the noxious fumes of the poisoned tobacco.

Though Craig was already convinced of what was going on, I knew that he always considered it a matter of considerable medico-legal importance to be exact, for if the affair ever came to the stage of securing an indictment the charge could be sustained only by specific proof.

As we appeared in the door, however, he laid aside his work, and greeted us.

"I suppose Jameson has already told you that I called you up last night--and what I said?" began Lockwood.

Kennedy nodded. "It was something about Norton, wasn't it?"

Lockwood leaned over impressively and almost whispered: "Of course, you are in no position to know, but there are ugly rumours current down in Lima among the natives regarding that dagger."

Kennedy did not appear to be particularly impressed. "Is that so?" he said merely. "What are they?"

"Well," resumed Lockwood, "I wasn't in Lima at the time. I was up here. But they tell me that there was something crooked about the way that that dagger was got away from an Indian--a brother of Senora de Moche." "Yes," replied Kennedy, "I know something about it. He committed suicide. But what has that to do with Norton?"

Lockwood hesitated, then shrugged his shoulders. "I should think the inference was plain," he insinuated. Then, looking at Craig fixedly, as though to take his measure, he added, "We are not out of touch with what is going on down there, even if we are several thousand miles away."

I wondered whether he had any information more than we had already obtained by X-raying the letter to Whitney signed "Haggerty." If he had, it was not his purpose, evidently, yet to disclose it. I felt from his manner that he was not playing a trump-card, but was just feeling us out by this lead.

"There was some crooked business about that dagger down there as well as here," he pursued. "There are many interests connected with it. Don't you think that it would be worth while watching Norton?" he paused, then added: "We do--and we're going to do it."

"Thank you very much," returned Kennedy quietly. "Mr. Whitney has already told me he intended to do so."

Lockwood eyed us critically, as though not quite sure what to make of the cool manner in which Craig took it.

"I think if I were you," he said at length, "I'd keep a close watch on the de Moches, both of them, too."

"Exactly," agreed Craig, without showing undue interest.

Lockwood had risen. "Well," he snapped, "you may not think much of what I am telling you now. But just wait until OUR detectives begin to dig up facts." No sooner had he left than I turned to Craig. "What was that?" I asked. "A plant?"

"Perhaps," he returned, clearing up the materials which he had been using.

The telephone rang.

"Hello, Norton," I heard Craig answer. "What's that? You are shadowed by some one--you think it is by Whitney?"

I had been expecting something of the sort, and listened attentively, but it was impossible to gather the drift of the one-sided conversation.

As Kennedy hung up the receiver I remarked, "So it was not a bluff, after all."

"I think my plan is working," he remarked thoughtfully. "You heard what he said? He guesses right the first time, that it is Whitney. The last thing he said was, 'I'll get even! I'll take some action!' and then he rang off. I think we'll hear something soon."

Instead of going out, Kennedy pulled out the several unsigned letters we had collected, and began the laborious process of studying the printing, analyzing it, in the hope that he might discover some new clue.

XVI

THE EAR IN THE WALL

Perhaps an hour later our laboratory door was flung open suddenly, and both Kennedy and I leaped to our feet.

There was Inez Mendoza, alone, pale and agitated.

"Tell me, Professor Kennedy," she cried, her hands clasped before her in frantic appeal, "tell me--it isn't true--is it? He wasn't there--no--no--no!"

She would have fainted if Craig had not sprung forward and caught her in time to place her in our only easy-chair.

"Walter," he said, "quick--that bottle of aromatic spirits of ammonia over there--the second from the left."

I handed it to him, and threw open the window to allow the fresh air to blow in. As I did so one of the papers Kennedy had been studying blew off the table, and, as luck would have it, fell almost before her. She saw it, and in her hypersensitive condition recognized it instantly.

"Oh--that anonymous letter!" she cried. "Tell me--you do not think that--the friend of my father's that it warned me to beware of--was--"

She did not finish the sentence. She did not need to do so.

"Please, Senorita," pleaded and soothed Kennedy, "try to be calm. What has happened? Tell me. What is it?"

The ammonia and the fresh air seemed to have done their work, for she managed to brace herself, gripping the arms of the chair tightly and looking up searchingly into Craig's face.

"It's about Chester," she managed to gasp; then seemed unable to go on.

It was the first time I had ever heard her use Lockwood's first name, and I knew that something had stirred her emotions more deeply than at any time since the death of her father.

"Yes," prompted Kennedy. "Go on."

"I have heard that you found foot-prints, shoe-prints, in the dust in the Museum after the dagger was stolen," she said, speaking rapidly, suppressing her feelings heroically. "Since then you have been collecting prints of shoes--and I've heard that the shoe-prints that were found are those of--of Mr. Lockwood. Oh, Professor Kennedy, it cannot be--there must be some mistake."

For a moment Kennedy did not say anything. He was evidently seeking some way in which to lead up to the revelation of the truth without too much shock.

"You remember that time in the tea room when we were sitting with Senora de Moche?" he asked finally.

"Yes," she said shortly, as though the very recollection were disagreeable to her.

Kennedy, however, had a disagreeable task, and he felt that it must be performed in the kindest manner.

"You remember then that she said she had one thing more to say, that it was about Mr. Whitney and Mr. Lockwood."

She was about to interrupt, but he hurried on, giving her no chance to do so. "She asked you to think it over. Suppose they did not have the dagger, she said. Then were their chances of finding the treasure any better than any one else had? And if they did have it, she asked what that meant. It is a dilemma, my dear Senorita, which you must meet some time. Why not meet it now?"

Her face was set. "You will remember, also, Professor Kennedy," she said, with a great effort controlling her voice, "that I said that Mr. Lockwood was not there to defend himself and I would not have him attacked by innuendo. I meant it to the Senora--I mean it to you!"

She had also meant it to defy him; but as she proceeded her voice broke, and before she knew it her nature had triumphed, and she was alternately sobbing and pleading.

For a minute or two Kennedy let her give vent to her emotions.

"It cannot be. It cannot be," she sobbed over and over. "He could not have been there. He could not have done it."

It was a terrible thing to have to disillusion her, but it was something now that had to be done. Kennedy had not sought to do so. He had postponed it in the hope of finding some other way. But now the thing was forced upon him.

"Who told you?" he asked finally.

"I was trying to read, to keep my mind occupied, as you asked me, when Juanita told me that there was some one in the living room who wanted to see me--a man. I thought it was either you or Mr. Jameson. But it was--Professor Norton--"

Kennedy and I exchanged glances. That was the action in revenge to Lockwood and Whitney which he had contemplated over the telephone. It was so cruel and harsh that I could have hated him for it, the more so as I recollected that it was he himself who had cautioned us against doing the very thing which now he had done in the heat of passion.

"Oh," she wailed, "he was very kind and considerate about it. He said he felt that it was his duty to tell me, that he would be anything, like an older brother, to me; that he could not see me blinded any longer to what was going on, and everybody knew, but had not love enough for me to tell. It was such a shock. I could not even speak. I simply ran from the room without another word to him, and Juanita found me lying on the bed. Then--I decided--I would come to you."

She paused, and her great, deep eyes looked up pathetically. "And you," she added bitterly, "you are going to tell me that he was right, that it is true. You can't prove it. Show me what it is that you have. I defy you!"

Somehow, as she rested and relieved her feelings, a new strength seemed to come to her. It was what Kennedy had been waiting for, the reaction that would leave her able for him to go on and plan for the future.

He reached into a drawer of a cabinet and pulled out the various shoe-prints which he had already shown Norton, and which he had studied and restudied so carefully.

"That is the print of the shoe in the dust of the Egyptian sarcophagus of the Museum," he said quietly. "Some one got in during the daytime and hid there until the place was locked. That is the print of Alfonso de Moche's shoe, that of Mr. Whitney's, and that of Mr. Lockwood's."

He said it quickly, as though trying to gloss it over. But she would not have it that way. She felt stronger, and she was going to see just what there was there. She took the prints and studied them, though her hand trembled. Hers was a remarkable mind. It took only seconds to see what others would have seen only in minutes. But it was not the reasoning faculty that was aroused by what she saw. It sank deep into her heart.

She flung the papers down.

"I don't believe it!" she defied. "There is some mistake. No--it cannot be true!"

It was a noble exhibition of faith. I think I have never seen any instant more tense than that in Kennedy's laboratory. There stood the beautiful girl declaring her faith in her lover, rejecting even the implication that it might have been he who had taken the dagger, perhaps murdered her father to insure the possession of her father's share of the treasure as well as the possession of herself.

Kennedy did not try to combat it. Instead he treated her very intuitions with respect. In him there was room for both fact and feeling.

"Senorita," he said finally, in a voice that was deep and thrilling with feeling, "have I ever been other than a friend to you? Have I ever given you cause to suspect even one little motive of mine?"

She faced him, and they looked into each other's eyes an instant. But it was long enough for the man to understand the woman and she to understand him.

"No," she murmured, glancing down again.

"Then trust me just this once. Do as I ask you."

For an instant she struggled with herself. What would he ask?

"What is it?" she questioned, raising her eyes to him again.

"Have you seen Mr. Lockwood?"

"No."

"Then, I want you to see him. Surely you wish to have no secrets from him any more than you would wish him to have anything secret from you. See him. Ask him frankly about it all. It is the only fair thing to him--it is only fair to yourself."

Senorita Mendoza was no coward. "I--I will," she almost whispered.

"Splendid!" exclaimed Kennedy in admiration. "I knew that you would. You are not the woman who could do otherwise. May I see that you get home safely? Walter, call a taxicab."

Senorita Mendoza was calmer, though pale and still nervous, when I returned. Kennedy handed her into the car and then returned to the laboratory for two rather large packages, which he handed to me.

"You must come along with us, Walter," he said. "We shall need you."

Scarcely a word was spoken as we jolted over the city pavements and at last reached the apartment. Inez and Craig entered and I followed, carrying just one of the packages as Craig had indicated by dumb show, leaving the other in the car, which was to wait.

"I think you had better write him a note," suggested Craig, as we entered the living room. "I don't want you to see him until you feel better--and, by the way, see him here."

She nodded with a wan smile, as though thinking how unusual it was for a meeting of lovers to be an ordeal, then excused herself to write the note.

She had no sooner disappeared than Kennedy unwrapped the package which I had brought. From it he took a cedar box, oblong, with a sort of black disc fixed to an arm on the top. In the face of the box were two little square holes, with sides of cedar which converged inward into the box, making a pair of little quadrangular pyramidal holes which ended in a small black circle in the interior.

He looked about the room quickly. Beside a window that opened out over a house several stories below stood a sectional bookcase. Into this bookcase, back of the books, in the shadow, he shoved the little box, to which he had already attached a spool of twisted wires. Then he opened the window and dropped the spool out, letting it unwind of its own weight until it fell on the roof far below. He shut the window and rejoined me without a word.

A moment later she returned with the dainty note which she had written. "Shall I send it by a messenger?" she asked.

"Yes, please," answered Kennedy, rising. As he moved a step to the door he held out his hand to her. "Senorita Mendoza," he said simply, in a tone that meant more than words, "you are a wonderful woman."

She took his hand without a word, and a moment later we were whisked down in the elevator.

"I must get on that roof on some pretext," remarked Kennedy, as we reached the street and he got his bearings. "Let me see, that house which backs up to the apartment is around the corner. Have the man drive us around there."

We located the house and mounted the steps. On the wall beside the brownstone door was pasted a little slip of paper, "Furnished Rooms."

"Splendid!" exclaimed Kennedy, as he read it. "Dismiss the taxi and meet me inside with the other package."

By the time I had paid the man and come up the steps again Kennedy had made a dicker with the landlady for a double room on the third floor for both of us, and, by payment of a week's rent, we were to have immediate possession.

"Our baggage will follow to-day," he explained, as we mounted the stairs to the room.

I thought the landlady would never get through expatiating upon what a select place she ran, and thus leave us alone in our room, but at last even her flood of words was stilled by demands from a servant downstairs who must be instructed if the selectness of the establishment were to be maintained.

No sooner were we alone than Kennedy tiptoed into the hall and made sure that we were not watched. It was then the work of only a few seconds to mount a ladder to a scuttle, unhook it, and gain the roof.

There, dangling down from the dizzy height above, swayed the twisted wire. He seized it, unrolled it some more, and sent me downstairs to catch it, as he swung it over the edge of the roof to one of our own windows. Then he rejoined me.

The other package, which had been heavier, consisted of another of those mysterious boxes, as well as several dry cells. Quickly he attached the wires to the box, placing the dry cells in the circuit. Then he began adjusting the mechanism of the box. So far I had only a vague idea of just what he had in mind, but gradually it began to dawn on me.