the crime in the mind of the man who waited in that vestibule. To no one else could that odor connect itself with crime. So I knew that if I could test all sixteen men it would be child's play to pick the murderer. But such a test was cumbersome. And the next circumstance you gave me made it unnecessary. I mean the fact of the 'fast watch' which, Miss Allison was able to tell me, could not have been fast at all. I saw that the watch must therefore have been set forward at least ten minutes, probably much longer. Who, between half past ten and two, could have done this, and for what reason? The one convincing possibility was that the assassin had set it forward, trusting it would not be found till morning, and his only object could have been to establish for himself an alibi—for two o'clock.
"I surprised you, therefore, by assuring you, even before I saw Kanlan, that he was innocent, because Kanlan had no alibi whatever. I proved his innocence to my own satisfaction by exhibiting before him without exciting any emotional reaction at all, the report in the News which, I felt fairly sure, must have had something to do with the crime; by loosing the smell of banana oil, and setting forward a watch in his presence. The objects which Crowley used had been so thoroughly connected with the crime in Kanlan's mind that—though he is innocent—they caused reactions to which I paid no attention, except the one reaction which, at Crowley's threat, told me of Kanlan's negro blood. As for the rest, they merely scared Kanlan as your pistol scared me, and as they
