Grant Richards
Philo Vance
Roscoe Karns
Sergeant Heath
Helen Burgess
Ada Greene
Ruth Coleman
Sibella Greene
Elizabeth Patterson
Mrs. Tobias Greene
June Martel
Barton
Ellen Drew
Secretary
Purnell Pratt
John F. X. Markham
Colin Tapley
Chester Greene
James Bush
Rex Greene
Leonard Carey
Lister
Nora Cecil
Harvey Stephens
Ivan F. Simpson
Greta Meyer
Myra Marsh
