The Mystery of the Tea Dansant

Ruth Roland

Ruth, the Girl Detective

R. Henry Grey

Harry Warrington

Cleo Ridgely

Marguerite Wheeler

Anna Lingham

Mrs. Wheeler - Marguerite's Mother

Thomas G. Lingham

Marmaduke - of the Tea Dansant

Knute Rahm

Darby - Marmaduke's Victim

Edward Clisbee

Chief of Police Harding

James W. Horne

Director

Hamilton Smith

Writer