| Description | Two letters from Lawrence M Razavi, Boston City Hospital, to Penrose. The first letter, dated 2 April 1964, regarding Penrose's dermatoglyphs for a patient with D Trisomy, and plans to test for abnormal haemoglobin. The second letter, dated 20 April 1965, thanks Penrose for more dermatoglyphics on a named patient, and for his enjoyable visit to the Galton Laboratory, also commenting on the exchange of methods and techniques during his visit. |