Marsh was born in 1839 in a small village in eastern England, near
Bungay, on the
Suffolk /
Norfolk border. is described as a "gentleman farmer", came from Brook, near Norwich. He studied at
St Bartholomew's Hospital ("Bart's") in London, where he signed on in December 1858, becoming a Member of the Royal College of Surgeons in June 1861. He was appointed house surgeon at the hospital in 1862, working under
Frederic Skey. In 1903 Marsh was appointed Professor of Surgery at
Cambridge University in belated succession to Sir George Murray Humphry (who had died in 1896). Marsh resigned from his post at
Bart's and relocated to Cambridge, becoming a fellow of
King's College. Four years later he relocated again, half a mile to the south, becoming Master of
Downing College, Cambridge. As Master of Downing College Marsh resisted government pressure to restrict access for students from
India, then an important
British Colony. Approximately one third of all Indian students attending Cambridge University during the early years of the twentieth century chose Downing College: Marsh attributed this to the college's reputation for excellent teaching of law, a subject favoured by India's burgeoning mercantile classes. Government pressure was part of a wider political strategy to limit anti-colonial activism in British universities. After consulting with fellow members of the college governing body Marsh politely rejected the
British minister's request to restrict admissions in a way which would have been "a rebuff to Indian students". ==Family==