"You know Senora de Moche and Alfonso?"
"Yes."
"I wish that you would cultivate their acquaintance. I feel that they are very suspicious of me. Perhaps they may not be so with you."
"Is there any special thing you want to find out?"
"Yes--only I have slight hopes of doing so. You know that she is on most intimate terms with Whitney."
"I"m afraid I can"t do much for you, then. She"ll fight shy of me.
He"ll tell her his story."
"That will make no difference. She has already warned me against him.
He has warned against her. It"s a most remarkable situation. He is trying to get her into some kind of deal, yet all the time he is afraid she is double-crossing him. And at the same time he obeys her--well, like Alfonso would Inez if she"d only let him."
Norton frowned. "I don"t like the way they hover about Inez Mendoza,"
he remarked. "Perhaps the Senora is after Whitney, while her son is after Inez. Lockwood seems to be impervious to her. Yes, I"ll undertake that commission for you, only I can"t promise what success I"ll have."
Kennedy restored the shoe-prints to the drawer.
"I think that"s gratifying progress," went on Norton. "First we know who stole the dagger. We know that the dagger killed Mendoza. You have even determined what the poison on the blade was. It seems to me that it remains only to determine who struck the actual blow. I tell you, Kennedy, Whitney will regret the day that he ever threw me over on so trivial a pretext."
Norton was pacing up and down excitedly now.
"My only fear is," he went on, "what the shock of such a thing will be on that poor little girl. First her father, then Lockwood. Why--the blow will be terrible. You must be careful, Kennedy."
"Never fear about that," rea.s.sured Craig. "Not a word of this has been breathed to her yet. We are a long way from fixing the guilt of the murder; inference is one thing, fact another. We must have facts. And the facts I want, which you may be able to get, relate to the strange actions of the de Moches."
Norton scanned Kennedy"s face for some hint of what was back of the remark. But there was nothing there.
"They will bear watching, all right," he said, as he rose to go. "Old Mendoza was never quite the same after he became so intimate with her.
And I think I can see a change in Whitney."
"What do you attribute it to?" asked Kennedy, without admitting that it had attracted his attention, too.
"I haven"t the slightest idea," confessed Norton.
"Inez is as afraid of her as any of the rest," remarked Kennedy thoughtfully. "She says it is the evil eye."
"Not an uncommon belief among Latin-Americans," commented Norton. "In fact, I suppose there are people among us who believe in the evil eye yet. Still, you can hardly blame that little girl for believing it is almost anything. Well, I won"t keep you any longer. I shall let you know of anything I find out from the de Moches. I think you are getting on remarkably."
Norton left us, his face much brighter than it had been when we met him at the door.
Kennedy, alone at last in the laboratory, went over to a cabinet and took out a peculiar-looking apparatus, which seemed, as nearly as I can describe it, to consist of a sort of triangular prism, set with its edge vertically on a rigid platform attached to a ma.s.sive stand of bra.s.s.
"Norton seems to have suddenly become quite solicitous of the welfare of Senorita Mendoza," I hazarded, as he worked over the adjustment of the thing.
Kennedy smiled. "Every one seems to be--even Whitney," he returned, twisting a set-screw until he had the alignment of the various parts as he wanted it.
The telephone bell rang.
"Do you want to answer it?" I asked Craig.
"No," he replied, not even looking up from his work. "Find out who it is. Unless it is something very important say I am out on an investigation and that you have heard from me; that I shall not be either at the laboratory or the apartment until tomorrow morning. I must get this done to-night."
I took down the receiver.
"h.e.l.lo, is this Professor Kennedy?" I recognized a voice.
"No," I replied. "Is there any message I can take?"
"This is Mr. Lockwood," came back the information I had already guessed. "When do you expect him?"
"It"s Lockwood," I whispered to Craig, my hand over the transmitter.
"See what he wants," returned Craig. "Tell him what I told you."
I repeated Kennedy"s message.
"Well, that"s too bad," replied Lockwood. "I"ve just seen Mr. Whitney, and he tells me that Kennedy and you are pretty friendly with Norton, Of course, I knew that. I saw you at the Mendozas" together the first time. I"d like to have a talk with him about that man. I suppose he has told you all his side of the story of his relations with Whitney."
I am, if anything, a good listener, and so I said nothing, not even that he had better tell it to Kennedy in the morning, for it was such a novelty to have any of these people talk voluntarily that I really didn"t much care whether I believed what they said or not.
"I used to know him down in Lima, you know," went on Lockwood. "What I want to say has to do with that dagger he says was stolen. I want to tell what I know of how he got it. There was an Indian mixed up in it who committed suicide--well, you tell Kennedy I"ll see him in the morning."
Lockwood rang off, and I repeated what he had told me, as Kennedy continued to adjust the apparatus.
"Say," I exclaimed, as I finished. "That was a harry"s of a commission you gave Norton just now, watching the de Moches. Why, they"d eat him alive if they got a chance, and I don"t know that all"s like a Sunday school on his part. Lockwood doesn"t seem to think so."
Kennedy smiled quietly. "That was why I asked him to do it," he returned. "I thought that he wouldn"t let much escape him. They all seem so down on him, he"ll have to watch out. It will keep him busy, too, and that means a chance for us to work."
He had finished setting up the machine, and now went over to another drawer, from which he took the envelope of stubs which we had taken down at Whitney"s office first. Then from the pocket of his street coat he drew both the second envelope of ashes and stubs, the whole cigarette from Lockwood"s case, and the stubs which both of us had saved from the cigarettes that had once belonged to Mendoza.
Carefully he separated and labelled them all, so that there would be no chance for them to get mixed up. Then he picked up one of the stubs and lighted it. The smoke curled up in wreaths between a powerful light and the peculiar instrument, while Craig peered through a lens, manipulating the thing with exhaustless patience and skill. I watched him curiously, but said nothing, for he was studying something carefully, and I did not want to interrupt his train of thought.
Finally he beckoned me over. "Can you make anything out of that?" he asked.
I looked through the eye-piece, also. On a sort of fine grating all I could see was a number of strange lines.
"If you want an opinion from me," I said, with a laugh, "you"ll have to tell me first what I am looking at."
"That," he explained, as I continued to gaze, "is one of the latest forms of the spectroscope, known as the interferometer, with delicately ruled gratings in which power to resolve the straight, close lines in the spectrum is carried to the limit of possibility. A small watch is delicate. But it bears no comparison to the delicacy of these defraction spectroscopes.
"Every substance, you know, is, when radiating light, characterized by what at first appears to be almost haphazard sets of spectral bands without relation to one another. But they are related by mathematical laws, and the apparent haphazard character is only the result of our lack of knowledge of how to interpret the results."
He resumed his place at the eye-piece to check over his results.
"Walter," he said finally, looking up at me with a twinkle in his eye, "I wish that you"d go out and find me a cat."