How old was Arthur Conan Doyle in The Return of Sherlock Holmes?

Clive BrookClive Brook was 42 in The Return of Sherlock Holmes as 'Sherlock Holmes'.

Birthday: Wed, Jun 01 1887 –
Sun, Nov 17 1974

H. Reeves-SmithH. Reeves-Smith was >> in The Return of Sherlock Holmes as 'Dr. Watson'.

Birthday: Unknown Birthday

Betty LawfordBetty Lawford was 17 in The Return of Sherlock Holmes as 'Mary Watson'.

Birthday: Thu, Feb 01 1912 –
Sun, Nov 20 1960

Charles HayCharles Hay was >> in The Return of Sherlock Holmes as 'Captain Longmore'.

Birthday: Unknown Birthday

Phillips HolmesPhillips Holmes was 22 in The Return of Sherlock Holmes as 'Roger Longmore'.

Birthday: Mon, Jul 22 1907 –
Wed, Aug 12 1942

Donald CrispDonald Crisp was 47 in The Return of Sherlock Holmes as 'Colonel Moran'.

Birthday: Wed, Jul 26 1882 –
Sat, May 25 1974

Harry T. MoreyHarry T. Morey was 56 in The Return of Sherlock Holmes as 'Professor Moriarty'.

Birthday: Wed, Aug 20 1873 –
Fri, Jan 24 1936

Hubert DruceHubert Druce was >> in The Return of Sherlock Holmes as 'Sergeant Gripper'.

Birthday: Unknown Birthday

Basil DeanBasil Dean was 41 in The Return of Sherlock Holmes as 'Director, Writer, Producer'

Birthday: Thu, Sep 27 1888 –
Sat, Apr 22 1978

William O. SteinerWilliam O. Steiner was 26 in The Return of Sherlock Holmes as 'Director of Photography'

Birthday: Fri, Jun 26 1903 –
Tue, Oct 01 1968

Garrett FortGarrett Fort was 29 in The Return of Sherlock Holmes as 'Writer'

Birthday: Tue, Jun 05 1900 –
Fri, Oct 26 1945

Arthur Conan DoyleArthur Conan Doyle was 70 in The Return of Sherlock Holmes as 'Writer'

Birthday: Sun, May 22 1859 –
Mon, Jul 07 1930

Helene TurnerHelene Turner was >> in The Return of Sherlock Holmes as 'Editor'

Birthday: Unknown Birthday