"Bernard Treves's Boots" by Laurence Clarke is a mystery novel set in WWI England. The story reveals the secret service of the author. Veteran takes the place of a rich ne'er-do-well, finding he was betraying his country. Excerpt: ""Are you sure your name is Manton?" Captain Gilbert looked keenly across the table. The light in the little room was not good, and the expression on the Captain's face was one of intense interest and bewilderment. "Quite sure, sir—John Manton," answered the man standing at the further side of the table."