 In later retirement he was concerned to preserve a more accurate record of the non-Enigma side of Bletchley Park, especially the work of the German Air Section.The first outcome was a talk given to a Cheltenham Probus club, later developed into a privately printed family memoir entitled 'Another Bit of Bletchley'.In 2007 he presented a paper to a research group in Oxford on "Bletchley Park and the RAF Y Service, some recollections."