Breeder: 12th Earl of Derby Won Derby Stakes (Eng), Prince of Wales`s Plate, Jockey Club Stakes, Claret Stakes, Grosvenor Stakes. Champion Sire in England 10 times. Often noted as just Sir Peter. When his half sister WREN (b f 1783 WOODPECKER) was bred to SIR PETER (TEAZLE) the mating produced: AGONISTES (b c 1797 SIR PETER); the name is from the Ancient Greek and means contender such as an athlete.