Don Winslow of the Navy

Lead Henchman at Mill [Ch. 5]

Gang Radioman Barker

Saboteur Kramer [Chs. 3-4]

Spencer Merlin

Seaman Chapman

Native Henchman at Mill [Ch. 5]

The CINCUS [Ch. 1]

Henchman Corley

Lt. Red Pennington

Paul Barsac