Stalag Luft III it as a longer third-person narrative under the title "The Wooden Horse", which was filmed as "The Wooden Horse" in 1950. He included many details omitted in his first book, but changed his name to "Peter Howard", Michael Codner to "John Clinton" and Oliver Philpot to "Philip Rowe". Williams also wrote a prequel, "The Tunnel", an extended study of the mentalities of life as a prisoner of war. Although not an escape novel, it shows the profound urge to escape, and explores the ways that camp life affected men's emotions. Paul Brickhill was an Australian-born Spitfire pilot, shot down in
Edgar Humphreys he was promoted again to flight lieutenant. At Stalag Luft I Humphreys met Roger Bushell during various tunnelling escape attempts, Bushell later masterminded the Great Escape. Humphreys, Jack Grisman, Leslie George Bull and several other prisoners were part of the group with Bushell who were sent to Stalag Luft III in the province of Lower Silesia near the town of Sagan (now Żagań in Poland). Allocated No.54 in the queue of officers escaping through the tunnel, Humphreys teamed up with No. 55 Paul Royle for no better reason than "he was next in the queue". He was one of the