The Adventures of Jimmie Dale

By day, Jimmie Dale moves easily through New York society, wealthy, respected, and above suspicion. By night he becomes the Gray Seal, a mysterious figure who leaves a small gray diamond mark wherever he appears.

Moving between elegant drawing rooms and the city's darker corners, Dale takes on dangerous secrets and powerful enemies. Every step carries the risk that his hidden identity will be exposed.

First published in 1917, The Adventures of Jimmie Dale introduced one of early crime fiction's most memorable masked heroes, a character who helped shape the spirit of later pulp and adventure stories.