George S. McWatters, Knots Untied; Or, Ways and By-ways in the Hidden Life of American Detectives
“ It is one of the greatest vexations which the detective suffers, that the nature of his business is such that he can never fully liberate his thoughts from dwelling upon the frailties, the follies, and particularly the crimes, petty and felonious, of which so many of his fellow-men are constantly being guilty. Like an incubus of dread and darkness, these thoughts are ever weighing on his mind. He has no peace; and the only approximate peace he can win, is to let his thoughts drift on in the usual current, without attempting to direct them by his will. ”
