John Colin Crosbie was born in Muswell Hill in 1897, the only son in the family. He came up to Dryden in 1911 and left four years later. In his last year, true to the traditions established in Dryden by the ex-housemaster and one-time mighty oarsman Llewellyn Jones, he stoked the school crew. Despite a tendency “to hurry his finish”, he “kept a very fair length and made a very useful stroke.” In his first year, he helped Dryden reach the final of the Junior Cricket competition, where they lost to a strong Sidney team. As a junior, he won a French prize. At the end of year Dryden House Concert, he teamed up with Norman Prynne for a sketch entitled ‘The Indian and the Scout’.
Prynne would be killed in Macedonia, some months before his friend. John Crosbie initially joined the Royal Garrison Artillery but then transferred to the Royal Flying Corps. He reached the rank of Lieutenant but was killed on 7th September 1917, aged 20. He was buried close to Hugh Davis, once of new House, in Aire Communal Cemetery.