Correspondence re personal news, career and research.
J//141: 1933–1939. Includes two letters from Humphrey to Synge's mother and two letters from Janet Rumney, daughter of A.V.Hill, whom Humphrey married in November 1939.
J/142: 1940-1941. Includes letter from Janet Humphrey.
J/143: 1944-1949
J/144: 1950–1953, 1955, 1957-1958
J/145: 1960, 1964–1965, 1971
J/146: 1985, 1988–1990. Includes the Times obituary of Humphrey (1987), order of memorial service at Trinity College Cambridge, and Synge's 'Recollections of John Humphrey as Schoolboy and Student (1929-1939)' written to aid Royal Society memorialists.