Marguerite Courtot

Marguerite

Richard Purdon

Peter Enright

Edward Roseman

Ferris - a Broker (as E.T. Roseman)

Bradley Barker

Hal Worth [Ch. 5] / Bob Winters [Ch. 6-16]

William Sherwood

Rudolph [Ch. 6]

Paula Sherman

Edwin Brandt

Dangler - an Adventurer [Ch. 7]

Julia Hurley

Martha [Ch. 6]

Phil Hardy

Fenton - Ferris' Partner

Helen Lindroth

Frances - Marguerite's Maid

Frank Holland

Leo - Frances' Husband

Robert Vaughn

Garrett - Leader of the Kidnappers [Ch. 3]

Harry Edwards

(as J. Harry Edwards)

F.B. Vernoy

Hal Worth [Ch. 4]

Walter McEwen

Durbar - an Oriental Mystic [Ch. 4]

Anna Reader

Martha - one of Durbar's Victims [Ch. 4]

Otto Niemeyer

Carlow - a Fortune Hunter [Ch. 5]

Freeman Barnes

Morton - Carlow's Accomplice [Ch. 5] /

Henry A. Barrows

Bolton - Head of a Band of Crooks [Ch. 8] (as H.E. Barrows)

Stella Jenno

Irene - Bolton's Accomplice [Ch. 8]

A. Lever

Gungha [Ch. 9]

Eleanor Lewis

Alota - Gungha's Accomplice [Ch. 9]

Lois Howell

Bertha - Gungha's Accomplice [Ch. 9]

R.A. Bennett

Kagler - Bob's Assistant [Ch. 10]

Joseph Sullivan

Wharton - a Foreign Agent [Ch. 10]

Roland Bottomley

Forrest Cummings

Hassan Mussalli