Wikipedia
Altisidora (1810–1825) was a British Thoroughbred racehorse and broodmare best known for winning the classic St Leger Stakes in 1813. Bred, trained and raced in Yorkshire she won two of her three races as a two-year-old in 1812. She was unbeaten for the next two seasons, winning three races including the St Leger at Doncaster as a three-year-old and four as a four-year-old in 1814. In her final season she won four of her eight races including a Great Subscription Purse at York, the Fitzwilliam Stakes at Doncaster and a King's Plate at Richmond. She was retired to stud, where she had some impact, being the grand-dam of Ralph, the winner 2000 Guineas and the Ascot Gold Cup. Altisidora died in 1825 at the age of fifteen.