The Riddle of the Sphinx

Juanita di Conchitas

Amru

Mummy

Marquis d'Yssé

Dr. Percy Grey

Prof. Grey, British Museum

Dr. Edward Pattison

Don Martunez de la Blanca

Empfangschef

Daisy Pattison

Baron Kollwitz

Fürst Popoff

Mehemed

Miss Peach