Here for the first time is a digest of known information about the stallions whose descendants appear in the early volumes of the American Quarter Horse Association studbook. Robert M. Denhardt, a former officer in the American Quarter Horse Association, spent many years tracking down the bloodlines of the foundation sires, their pedigrees, and highlights of their careers. The result is a brief but comprehensive alphabetical listing of the stallions that made the Quarter Horse one of the most exciting and popular breeds of horses in the American as today.