Henry “Chips” Channon (1897–1958) spent his life inventing himself as an aristocrat. He made no bones about it. More than mere social climbing, this can only have been a personality disorder of a harmless kind. A genial character when all was said and done, he added to the gaiety of the British nation. Some of the world’s most revealing works of literature are first-person accounts of self-discovery, and this diary belongs on the same shelf.