Hello! I'm a historian doing work on David Seth-Smith, who presented the 'Zoo Man' on BBC Children's Hour. In the BBC's archive I came across a letter from Seth-Smith asking for permission to use the 'Zoo Man' name on a gramophone record to be sold at the London Zoo in 1936. The principle was that one one side Seth-Smith would record 'an account' of the Zoo, and on the other side visitors could record their own message, before sending the complete record as a souvenir to friends and family. Recording booths which produced these sorts of 'instant' records were popular in the early and mid-twentieth century, but I haven't found any firm evidence of their use in the London Zoo. I know that Julian Huxley produced his 'Zoo Voices' record and 'Animal Language' soundbook around this time, but I haven't come across anything more on the DIY gramophone record with David Seth-Smith on the other side. I wonder if anyone on this forum has any more information about this?