Calvin Demarest was born on June 20, 1888 and died on June 12, 1925.  He took the 18.2 billiard championship in December 1909, and his final match to win it (against George Sutton), may have been the fastest 18.2 match ever played: it took Demarest  just over an hour to score the requisite 500 points. Demarest suffered a mental breakdown in 1915, attacking both his wife and his mother with a knife. He died while still institutionalized.