New York: A. L. Burt, (c 1919). Hardcover - The second book in this popular mystery series by this Canadian author, set in a New York City of "evil-smelling tenements and back alleys as the haunts of dope fiends, thieves and murderers." Dale, who was known as the Grey Seal, was a wealthy New Yorker by day and an expert safecracker at night - Able to surreptitiously change from one identity to the other, he worked to expose the seedy and corrupt underbelly. 340 pp plus 12 pp publisher's ads.