Frank L. Packard,
The Adventures of Jimmie Dale
(1917)
“ It was no wonder that Bristol Bob himself was on the job! Two men were in the room: Lannigan of headquarters, rated the smartest plain-clothes man in the country—and, across the table from Lannigan, Whitey Mack, as clever, finished and daring a crook as was to be found in the Bad Lands, whose particular "line" was diamonds, or, in the vernacular of his ilk, "white stones," that had earned him the sobriquet of "Whitey." Lannigan of headquarters, Whitey Mack of the underworld, sworn enemies those two—in secret session! Bristol Bob might well play the part of outer guard. ”
