Chelsea Cabmen’s Orphanage

a fictitious charity; Chelsea is a select central suburb of London, beside the Thames about two miles up-stream of Charing Cross; James neologism may be an ironic inversion of the Royal Hospital (also sited by the river), which provided care for veterans of the regular army (‘Chelsea pensioners’)

(for later twentieth-century British readers the name also invokes the humorist Beachcomber’s favourite review item, volume three of the list of Huntingdonshire cabmen)