. . . "Quadrangle"@en . . . . "Stallion" . . "Quadrangle (1961\u20131978) was an American Thoroughbred racehorse who won the 1964 Belmont Stakes. Bred in Virginia by Paul Mellon, he was foal at the Rokeby Farm near Upperville. He was out of the mare Tap Day, a daughter of the Calumet Farm champion stallion Bull Lea."@en . . . . . . . .