It was 50 years ago today that pianist Glenn Gould made his American debut at the Philips Collection in Washington DC. “With the exception of his celebrated pan of singing first daughter Margaret Truman (which elicited a threatening letter from the White House), this is probably the most famous review Washington Post critic Paul Hume ever wrote. And rightly so, for Gould’s debut stands out as one of the highest peaks in the history of Washington musical life — an unheralded Sunday afternoon concert in a small venue that helped set a magnificent career into play.”