The Guineas was the filly's only competitive win in six races, her other victory coming when she was allowed to walk over on her racecourse debut. Background Catgut was a brown mare bred by her owner George FitzRoy, 4th Duke of Grafton at his stud at Euston Hall in Suffolk. Her dam, Vanity, was bred by the 4th Duke's father Augustus FitzRoy, 3rd Duke of Grafton and won twelve races before being retired to stud. In 1815 the mare was covered by two stallions, Comus and the less well-known Juniper. Comus finished third in the Derby and sired many good horses including the classic winners Grey Momus and Reveller.
The Guineas was the filly's only competitive win in six races, her other victory coming when she was allowed to walk over on her racecourse debut. Background Catgut was a brown mare bred by her owner George FitzRoy, 4th Duke of Grafton at his stud at Euston Hall in Suffolk. Her dam, Vanity, was bred by the 4th Duke's father Augustus FitzRoy, 3rd Duke of Grafton and won twelve races before being retired to stud. In 1815 the mare was covered by two stallions, Comus and the less well-known Juniper. Comus finished third in the Derby and sired many good horses including the classic winners Grey Momus and Reveller.