UPDATE! Now on the Washington Post! Their new “Made By History” column is fantastic, by the way, and I recommend becoming a regular reader of it. If you have a .edu email address, you can get an online subscription for free (google it for instructions on how to do that).
Interesting historical tidbits I couldn’t fit into the column: Unity and Diana Mitford were both fascists – Diana married Oswald Mosley 2 years after the letter I quoted, and though they were both in prison in Britain during the war, they lived long after and remained unrepentant. Unity ended up becoming a close confidant of Hitler, but shot herself in the head when war broke out between Britain and Germany. She lived for a few years, but lost her faculties. Their other sister, Jessica, was a Communist. In 1936 she eloped with Esmond Romilly and they ran away to Spain, then later to the US. Romilly was one of the Communists who went to the Olympia rally to protest it.