His luck piece was gone--that was it! The old silver trade dollar, worn thin and smooth by years of handling and with the hole drilled through the centre of it--that was what was gone--his token, his talisman, his charm against evil fortune. He had carried it for years, ever since he had turned crook, and for nothing in this world would he have parted from it. In a mounting flurry of superstitious terror he searched the pockets again, with fingers that shook--this man who had lost faith in human beings, who had no hope and no fear for the hereafter, who had felt no stabs of regret or repentance for having killed a man, whose thoughts had never known remorse for any misdeed of his. The second hunt and the third and the fourth were fruitless as his first one had been; Trencher's luck piece was gone. Those wise men, the alienists, say that all of us are insane on certain subjects, however sane we may be upon other subjects. Certainly in the mental composition of every one of us is some quirk, some vagary, some dear senseless delusion, avowed or private. As for Trencher, the one crotchet in his cool brain centred about that worthless trade dollar. With it in his possession he had counted himself a winner, always. Without it he felt himself to be a creature predestined and foreordained to disaster. To it he gave all the credit for the fact that he had never served a prison sentence. But once, and once only, had he parted company with it, even temporarily. That was the time when Murtha, that crafty old Central-Office hand, had picked him up on general principles, had taken him to headquarters, and first stripping him of all the belongings on his person, had carried him to the Bertillon Bureau, and then and there, without shadow of legal right, since Trencher was neither formally accused of nor formally indicted for any offence and had no previous record of convictions, had forced him to undergo the ordeals, ethically so repugnant to the instincts of the professional thief, of being measured and finger-printed and photographed, side face and full face. He had cursed and protested and pleaded when Murtha confiscated the luck piece; he had rejoiced when Murtha, seeing no harm in the thing, had restored it to him before lodging him in a cell under the all-embracing technical charge of being a suspicious person. Because he had so speedily got it back, Trencher had gone free again with the loss of but two days of liberty--or anyway, so Trencher firmly believed. But because it had left his custody for no more than an hour his pictures were now in the Gallery, and Murtha had learned the secret of Trencher's one temperamental weakness, one fetish.