Colonel Edward Buchanan Cassatt (August 23, 1869 – January 31, 1922) was an American soldier and an owner/breeder of Thoroughbred racehorses. He was the son of Alexander Cassatt, president of the Pennsylvania Railroad, and his wife, Lois Buchanan, a niece of James Buchanan, 15th President of the United States. He married Emily Louise Phillips in 1893 and divorced in 1904. They had one child, Lois, who married John B. Thayer III. He married a second time in 1908 to Eleanor Blackford Smith of Virginia. She was about twenty years his junior and shared his love of horses. [1]