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William Walcott
Professor Strangerson
Edmund Elton
Robert Darzac
George Cowl
Frédéric Larsan
Ethel Grey Terry
Mathilde Strangerson
Lorin Baker
Joseph Rouletabille
Jean Del Val
Jean Sainclair
W. H. Burton
Daddy Jacques
Henry S. Koser
Mr. Bernier
Jean Ewing
Mrs. Bernier
William Morrison
Judge Marquet
Louis R. Grisel
Mr. Maleine
John McQuire
Mr. Mathieu
