Handwritten poems and cartoons, a matchbox with a snarky homemade label, Christmas cards and signed gifts from various Beatles (who were friends), and other miscellaneous stuff belonging to the comedian and founder of BBC radio’s legendary Goon Show went for surprisingly high prices at Bonham’s in London this week. (Oddly, a restored 1883 Broadwood grand piano, estimated at £2,000 to £3,000 and occasionally played by no less than Paul McCartney, went to a friend of the family for £400. Where were the period-instrument folks?)