St. Simon was an undefeated British Thoroughbred racehorse and one of the most successful sires in the history of the Thoroughbred. In May 1886 The Sporting Times' carried out a poll of one hundred experts to create a ranking of the best British racehorses of the 19th century. St. Simon was ranked fourth, having been placed in the top ten by 53 of the contributors.

Galopin (1872–1899) was a British Thoroughbred racehorse and sire. In a racing career which lasted from June 1874 until October 1875 he ran nine times and won eight races. He was one of the best British two-year-olds of 1874, winning his first three races before sustaining the only defeat of his career in the Middle Park Plate. In 1875, he won all five of his races including the Derby. At the end of the season he was retired to stud where he became an extremely successful and influential breeding stallion.