LITMIR.BIZ

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slowly.

      "The weed of madness?" I repeated.

      "Yes, something like that Mexican toloache and the Hindu datura which you must have heard about," he continued. "You know the jimson weed—the Jamestown weed? It grows almost everywhere in the world, but most thrivingly in the tropics. They are all related in some way, I believe. The jimson weed on the Pacific coast of the Andes has large white flowers which exhale a faint, repulsive odor. 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.

      "I think those cigarettes have been doped," he went on positively. "It isn't toloache that was used. I think it must be some particularly virulent variety of the jimson weed. Perhaps it is in the preparation of the thing. The seeds of the stramonium, which is the same thing, contain a higher percentage of poison than the leaves and flowers. Perhaps they were used. I can't say."

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

      Next he took from the shelf over his table a bottle marked alcoholic solution, potassium hydrate, and let a drop fall on it. Instantly the residue became a beautiful purple, turning rapidly to violet, then to dark red and finally disappeared.

      "Stramonium all right," he nodded with satisfaction. "That was known as Vitali's test. Yes, there was stramonium in those cigarettes—datura stramonium—perhaps a trace of hyocyamino. They are all, like atropine, mydriatic alkaloids, so-called from the effect on the eye. One one-hundred-thousandth of a grain will affect the cat's eye. You saw how it acted. It is more active than even atropine. Better yet, you remember how Don Luis's eyes looked."

      "How about the Señora?" I put in.

      "Oh," he answered quickly, "her pupils were normal enough. Didn't you notice that? This concentrated poison which has been used in Mendoza's cigarettes does not kill, at least not outright. It is worse. Slowly it accumulates in the system. It acts on the brain. Of all the dangers to be met with in superstitious countries, these mydriatic alkaloids are among the worst. They offer a chance for crimes of the most fiendish nature—worse than the gun or the stiletto, and with little fear of detection. It is the production of insanity!"

      Horrible though the idea was I could not doubt it in the face of Craig's investigations and what I had already seen. In fact, it was necessary for me only to recall the peculiar sensations I myself had experienced after smoking merely a few puffs of one of Mendoza's cigarettes in order to be convinced of the possible effect of the insidious poison contained in the many that he smoked.

      It was almost dawn before Craig and I left the laboratory after his discovery of the manner of the stramonium poisoning. 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 Kennedy was about early at the laboratory, verifying his experiments and checking over his results, carefully endeavoring to isolate any other of the closely related mydriatic alkaloids that might be contained in the noxious fumes of the poisoned tobacco. Though he was already convinced of what was going on, I knew that he 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.

      Early in the forenoon Kennedy left me alone in the laboratory and made a trip downtown, where he visited a South American tobacco dealer and placed a rush order for a couple of hundred cigarettes, duplicating in shape and quality those which Señor Mendoza doza preferred, except, however, the deadly drug which was in those he was smoking.

      I had some writing to do and was busily engaged at my typewriter when I suddenly became conscious of that feeling of being watched. Perhaps I had heard a footstep outside and did not remember it, but at any rate I had the feeling. I stopped tapping the keys suddenly and wheeled about in my chair just in time to catch a glimpse of a face dodging back from the window. I don't think that I would be prepared to swear just who it was, but there was just enough that was familiar about the fleeting glimpse of the eyes to make me feel uncomfortable.

      I ran to the door, but it was too late. The intruder had disappeared. Still, the more I thought about it, the more determined I was to verify my suspicions, if possible. I put on my hat and walked over to the registrar's office. Sure enough, Alfonso de Moche was registered in the summer school as well as in the regular course. I was now fully convinced that it was he who had been watching us.

      Not satisfied, I determined to make further inquiries about the young man. He had been at the University that morning, I learned from one of his professors, and that convinced me more than ever that he had employed at least a part of the time in spying on us. As I had expected, the professor told me that he was an excellent student, though very quiet and reserved. His mind seemed to run along the line of engineering and mining, especially, and I could not help drawing the conclusion that perhaps he, too, was infected by the furore for treasure hunting, in spite of his Indian ancestry.

      Nothing further occurred, however, during the day to excite suspicion and Craig listened with interest, though without comment, when I related what had happened. He divided his time during the rest of the day between some experimental work of his own and fits of deep reverie in which he was evidently trying to piece together the broken strands of the strange story in which we were now concerned.

      The package of cigarettes which he had ordered was delivered late in the afternoon. Kennedy had already wrapped up a small package of a powder and filled a small atomizer with some liquid. Stowing these things away in his pockets as best he could, with a little vial which he shoved into his waistcoat pocket, he announced that he was ready at last to take an early train to Atlantic Beach.

      We dined that night, as Craig had requested, with the Mendozas and Lockwood up in the sitting-room of Don Luis's suite. It was a delightfully situated room, overlooking the boardwalk and the ocean, and the fresh wind that was wafted in from the water made it quite the equal of a roof garden.

      Dinner had been ordered but not served, when Craig maneuvered to get a few minutes alone with Inez. Although I could not hear, I gathered that he was outlining at least a part of his plans to her and seeking her co-operation. She seemed to understand and approve, and I really believe that the dinner was the first in a long time that the distracted girl had really enjoyed.

      While we were waiting for it, I suddenly became aware that she had contrived to leave Kennedy and myself alone in the sitting-room for a moment. It was evidently part of Craig's plan. Instantly he opened a large case in which Mendoza kept cigarettes and hastily substituted for those in it an equal number of the cigarettes which he had had made.

      The dinner itself was more like a family party than a formal dinner, for Kennedy, when he wanted to do so, had a way of ingratiating himself and leading the conversation so that everyone was at his ease. Everything progressed smoothly until we came to the coffee. The Señorita poured, and as she raised the coffee pot Kennedy called our attention to a long line of colliers just on the edge of the horizon, slowly making their way up the coast.

      I was sitting next to the Señorita, not particularly interested in colliers at that moment. From a fold in her dress I saw her hastily draw a little vial and pour a bit of yellowish, syrupy liquid into the cup which she was preparing for her father.

      I could not help looking at her quickly. She saw me, then raised her finger to her lips with an explanatory glance at Kennedy, who was keeping the others interested in colliers. Instantly I recognized the little vial that Kennedy had shoved into his vest pocket.

      More coffee and innumerable cigarettes followed. I did my best to aid in the conversation, but my real interest was centered in Don Luis himself, whom I could not help watching closely.

      Was it a fact or was it merely imagination? He seemed quite different. The pupils of his eyes did not seem to be quite so dilated as they had been the night before. Even his heart action appeared to be more normal. I think the Señorita noticed it, too.

      Dinner over and darkness cutting off the magnificent

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