Harold Felton, of the United States Army.
Carleton Everton, a young Englishman.
Karl Schoneman, of the German Secret Service.
Franz Muller, his assistant.
Arthur Merrill, also of the United States Army.
Inspector Malcome Steele, of the United States Secret Service.
Henry Gootner, a German agent.
Francis Drury, one of Treadwell’s guests.
Corporal Thayer.
Private Freeman.