The Lone Wolf by Louis Joseph Vance

He was singularly free from any sort of exultation over the manner in which he had at once compassed his own escape and brought down catastrophe upon his self-appointed murderers; his mood was quick with wonder and foreboding and bewilderment. The more closely he examined the affair, the more strange and inexplicable it bulked in his understanding. He had not thought to defy the Pack and get off lightly; but he had looked for no such overt effort at disciplining him so long as he kept out of the way and suspended his criminal activities. An unwilling recruit is a potential traitor in the camp; and retired competition isn't to be feared. So it seemed that Wertheimer hadn't believed his protestations, or else Bannon had rejected the report which must have been made him by the girl. In either case, the Pack had not waited for the Lone Wolf to prove his insincerity; it hadn't bothered to declare war; it had simply struck; with less warning than a rattlesnake gives, it had struck -- out of the dark -- at his back.

And so -- Lanyard swore grimly -- even so would he strike, now that it was his turn, now that his hour dawned.