Born Thomas Forrest Main, he studied medicine at Durham University before becoming superintendent at Gateshead Mental Hospital. During the Second World War he joined the Royal Army Medical Corps as an adviser in psychiatry, attaining the rank of lieutenant colonel. After the war he went to Cassel Hospital where he worked for the next thirty years.
- Obituary, BMJ, Volume 300, 30 June 1990
- Elizabeth Barnes, ed., Psychosocial nursing, London, New York [etc.] Tavistock Publications, 1968. Papers written over the period 1946-1967 ... compiled as a tribute to T.F. Main.