The Riders of the Whistling Skull

Robert Livingston

Stony Brooke

Ray Corrigan

Tucson Smith

Max Terhune

Lullaby Joslin

Mary Russell

Betty Marsh

Roger Williams

Rutledge

Fern Emmett

Henrietta McCoy

C. Montague Shaw

Professor Flaxon

Yakima Canutt

Otah

John Ward

Professor Brewster

George Godfrey

Professor Fronc

?

Earle Ross

Professor Cleary

Frank Ellis

Coggins

Chief Thundercloud

High Priest

?

John Van Pelt

Professor Marsh