Some surviving charters from Coenred's reign reveal him to have been the overlord of the East Saxon rulers. Offa, an East Saxon king, made a grant in the territory of the Hwicce (to which he may have been connected by a marriage of his father, Sigeheard) which was later confirmed by Coenred. In the charter, Coenred refers to Offa as his underking. Coenred and his successor also confirmed grants to Waldhere, the Bishop of London, evidence that London was firmly under Mercian overlordship. Later Mercian kings treated London as their direct possession, rather than as a province ruled by an underking, but Coenred did not go that far. A grant of land in Herefordshire to a nun named Feleburg has survived, as have forged charters in Coenred's name granting privileges to St Paul's Cathedral, and to the Abbey of Evesham.