"Then why did you leave?" McMurdo nodded towards the policemen and smiled. "I guess those chaps would be glad to know," he said. Scanlan groaned sympathetically. "In trouble?" he asked in a whisper. "Deep." "A penitentiary job?" "And the rest." "Not a killing!" "It's early days to talk of such things," said McMurdo with the air of a man who had been surprised into saying more than he intended. "I've my own good reasons for leaving Chicago, and let that be enough for you. Who are you that you should take it on yourself to ask such things?" His gray eyes gleamed with sudden and dangerous anger from behind his glasses.