| Description | Correspondence between Hans Forssman and Penrose, consisting of 13 letters, regarding the parents' and grandparents' ages in Down's syndrome cases discussed in a paper (in Acta Paediatrica, volume 49, 1960) and letter (in The Lancet, 10 June 1961) Forssman prepared jointly with Dr Lehmann. Encloses a photograph of a female infant with Down's syndrome, and a typed transcription of the letter in The Lancet, 10 June 1961. |