The Abbey of Chertsey was among the earliest of the great monasteries of the south of England. Its foundation was ascribed to Earconwald bishop of London and Wulfhere, king of the Mercians in the seventh century, supported by Frithwald subregulus of Surrey, whose name is the only extant name of the kings of the Suthrige. The abbots of Benedictine Houses of royal foundation were, as a rule, lords of Parliament in later centuries. The abbot of Chertsey, though a mitred abbot, was not; perhaps the king of the Mercians, though certainly overlord at the time of all southern England, was not sufficiently like a king of England to be counted. The fact of the royal foundation is sufficiently attested by Bede; about the circumstantial accounts of its endowment a little doubt may be entertained. But Chertsey was a rich and an important house, and the abbots occupied distinguished positions. Abbot Hugh accompanied Ralph archbishop of Canterbury to Rome, after 1114, in the capacity of physician, when the archbishop went as an ambassador in the controversy concerning the relative positions of the sees of Canterbury and York.