1944. "A sketchbook comprising 56 pages with card and linen cover inscribed with artist's name, rank and 'Changi Gaol Singapore Aug 1944'. Various annotated sketches of buildings in and around Changi Gaol, including detailed notes of a Chinese temple; portraits of Japanese guards and fellow prisoners; sketches of the prison orchestra and notes at the end of the book relating to prison concerts."
Further reading: https://illustrationchronicles.com/the-war-drawings-of-ronald-searle