 The synod at Croft held by Wiglaf in 836, which Beorhtwulf may have attended, was the last such conclave called together by a Mercian king. During Beorhtwulf's reign and thereafter, the kingdom of Wessex had more influence than Mercia with the Archbishop of Canterbury. A charter of 840 provides evidence of a different kind concerning Beorhtwulf's relations with the church. The charter concerns lands that had originally been granted by Offa to the monastery of Bredon in Worcestershire. The lands had come under the control of the church in Worcester, but Beorhtwulf had seized the land again. In the charter Beorhtwulf acknowledges the church's right to the land, but forces a handsome gift from the bishop in return: "four very choice horses and a ring of 30 mancuses and a skilfully wrought dish of three pounds, and two silver horns of four pounds ... [and] ... two good horses and two goblets of two pounds and one gilded cup of two pounds." This is not an isolated case; there are other charters that show Mercian kings of the time disputing property with the church, such as a charter of 849 in which Beorhtwulf received a lease on land from the bishop of Worcester, and promised in return that he would be "more firmly the friend of the bishop and his community" and, in the words of historian Patrick Wormald, "would not rob them in future". Wormald suggests that this ruthless behaviour may be explained by the fact that landed estates were becoming harder to find, as so much land had been granted to monasteries. The problem had been mentioned over a century before by Bede, who in a letter to Egbert, the Archbishop of York, had complained of "a complete lack of places where the sons of nobles and of veteran thegns can receive an estate". Beorhtwulf's concession of wrongdoing suggests that he could not rely on his nobles to support him in such a disagreement, and may indicate that his hold on the throne was insecure.
