At 3am one morning in 1941, Eleanor Roosevelt spotted the Prime Minister, “cigar in hand,” searching for the President. Politely but firmly, she convinced him to postpone his mission until breakfast. Churchill’s nocturnal White House prowling influenced acquisition of Blair House as White House guest quarters, but he never spent the night there. There is no evidence, however, that Churchill was ever accommodated at Blair House; his alternate residence in Washington was the British Embas...