Unfortunately I have not been able to place a name to the character that the pictured Ben Webster was playing in the stage
production of
A Man of His Word although undoubtedly the character was a that of a British serving officer.

Ben Webster was born on 2 June 1864 in London the son of W. S. Webster, and grandson of the famous actor Benjamin Nottingham

While having a successful stage career Webster was more noted a film career that spanned the years 1913 - 1943 performing is 43
films during that time. Some of the more notable if these were
The Old Curiosity Shop (1935), The Prisoner of Zenda (1937) Mrs.
(1942) and Lassie Come Home (1943)

Webster married May Whitty (later Dame May Whitty) in 1892 and they remained married until his death in Hollywood, California
in 1947. They had one daughter actress/director Margaret Webster (1905 - 1972).

Cabinet Photograph
Alfred Ellis & Walery- Photographer
51 Baker Street, London
c. 1901