 It was built in the 1870s as Oak Openings High School and the naturalist and story teller Jim Corbett studied at it.In 1905, Oak Openings was amalgamated with the Philander Smith Institute of Mussoorie, resulting in the Philander Smith College.In the wake of the Second World War, Hallet War School was built on the same campus, established for the children of the British who were in India at that time due to the war.