グリーナムステークス
Privy Councillor was a chestnut horse, bred by his owner Gerald Glover at his Pytchley House stud in Northamptonshire. He was sired by Counsel, the winner of the 1955 Greenham Stakes and two edition of the Rose of York Stakes. Privy Councillor's dam High Number was bought by Glover as a foal for 750 guineas and showed modest ability on the track, winning two minor races as a four-year-old. She was the first mare to be covered by Counsel when the stallion began his stud career in 1958. High Number was a granddaughter of the broodmare Thirteen, whose other descendants have included Oasis Dream and Beat Hollow.