Overview
Eclipse (1 April 1764 – 26 February 1789) was an undefeated 18th-century British Thoroughbred racehorse who won 18 races, including 11 King's Plates. He raced before the introduction of the British Classic Races, at a time when four-mile heat racing was the norm. He was considered the greatest racehorse of his time and the expression, "Eclipse first, the rest nowhere" entered the English vernacular as an expression of dominance.
After retiring from racing, he became a very successful sire, whose offspring included three Epsom Derby winners: Young Eclipse, Saltram and Serjeant. He was also a successful sire of sires, and his sire line has become dominant in the modern Thoroughbred worldwide through descendants such as Northern Dancer, Mr. Prospector and Sunday Silence.
Breeding
Eclipse was foaled during and named after the solar eclipse of 1764, at the Cranbourne Lodge stud of his breeder, Prince William Augustus, Duke of Cumberland. It was at this stud that his sire, the Jockey Club Plate winner Marske (by Squirt from The Ruby Mare) stood. His dam, Spilletta (foaled 1749), was by Regulus, who was by the Godolphin Arabian. Eclipse's male-line great-grandsire was Bartlett's Childers, and his male-line great-great-grandsire was Darley Arabian. Eclipse was a brother to the successful broodmare Proserpine. They were inbred to Snake in the fourth generation of their pedigree. After the death of Prince William in 1765, Eclipse was sold for 75 guineas to a sheep dealer from Smithfield, William Wildman.
Eclipse was a bright chestnut with a narrow blaze running down his face. He had a white stocking on his right hind leg. Eclipse was a big horse for his time, just over , and was an inch higher at the rump than at the withers. He was strong, sound and fast. He was sometimes criticized for having a large, unattractive head. His difficult temperament was well documented, and might have led to him being gelded. Instead he was turned over to a rough-rider, who worked him hard all day, and at night as well on poaching expeditions if the stories are to be believed. This treatment, rather than souring his disposition, settled Eclipse enough to allow him to be raced, although his jockeys never attempted to hold him.
From Wikipedia (CC BY-SA 4.0).