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
Stalag III-D and RL 128 at Bieldorf. Prisoners of Stalag III-D were also housed in a number of sub-camps ("Zweiglager"), designated Stalag III-D/Z: Two further sub-camps; Stalag III-D/999 in Zehlendorf West, Berlin, and Stalag III-D/517 at Genshagen, Ludwigsfelde, were created in May–June 1943 as "Holiday Camps", offering better living conditions, and a steady diet of propaganda, in an attempt to persuade prisoners into joining the British Free Corps. The Germans particularly sought out former members and sympathizers of the British Union of Fascists, but the attempt was largely a failure with the unit never numbering more than about 30 men at any