What metaphors are used in Goodbye to All That by Robert Graves?

Charterhouse School is a metaphor for the oppressive British class system. Charterhouse School is an English independent school in the county of Surrey. It was founded on the site of an old Carthusian Monastery, and for this reason, pupils are referred to as Carthusians and alumni as Old Carthusians. It was one of the original English public schools created by the Public Schools Act of 1868. Robert Graves completed most of his primary education at Charterhouse. His description of it presents it as a tradition-bound school where hazing was common and students' lives were often unpleasant.