Another locked-room mystery by British master storyteller Edgar Wallace. In this tale, John Lexman, a renown mystery writer, is imprisoned on charges of murder. T.X. Meredith, his friend employed by Scotland Yard, tries to prove his innocence.

Richard Horatio Edgar Wallace (1875-1932) was a prolific British crime writer, journalist and playwright, who wrote 175 novels, 24 plays, and countless articles in newspapers and journals. Over 160 films have been made of his novels, more than any other author. In the 1920s, one of Wallace's publishers claimed that a quarter of all books read in England were written by him.