Felo de Se

He became a writer of detective stories, mostly featuring the medico-legal forensic investigator Dr Thorndyke. The first of the books in the series was 'The Red Thumb Mark' (1907). His first published crime novel was 'The Adventures of Romney Pringle' (1902) and was a collaborative effort published under the pseudonym Clifford Ashdown. Within a few years he was devoting his time to full-time writing.