Letter from Howard Walter Florey to Under Secretary of State, Home Office, London Sorry to learn that G H Jeffries has not sent in his licence, under Cruelty to Animals Act, and return of experiments - thought he had made it clear to Jeffries that he had to do this - has written instructing him to do this - cannot give any information about Jeffries' activities while at the Radcliffe Infirmary. 29 September 1956