Characters of the Book + 

Philo Vance. + 

John F.-X. Markham. District Attorney of New York County. + 

Mrs. Tobias Greene. The mistress of the Greene mansion. + 

Julia Greene. The eldest daughter. + 

Sibella Greene. Another daughter. + 

Ada Greene. The youngest daughter. + 

Chester Greene. The elder son. + 

Rex Greene. The younger son. + 

Dr. Arthur Von Blon. The Greene family physician. + 

Sproot. The Greene butler. + 

Gertrude Mannheim. The cook. + 

Hemming. The senior maid. + 

Barton. The junior maid. + 

Miss Craven. Mrs. Greene’s nurse. + 

Chief Inspector O’Brien. Of the Police Department of New York City. + 

William M. Moran. Commanding officer of the Detective Bureau. + 

Ernest Heath. Sergeant of the Homicide Bureau. + 

Snitkin. Detective of the Homicide Bureau. + 

Burke. Detective of the Homicide Bureau. + 

Captain Anthony P. Jerym. Bertillon expert. + 

Captain Dubois. Fingerprint expert. + 

Dr. Emanuel Doremus. Medical Examiner. + 

Dr. Drumm. An official police surgeon. + 

Marie O’Brien. A Police nurse. + 

Swacker. Secretary to the District Attorney. + 

Currie. Vance’s valet. + 