The main source for this period is Bede's "History", completed in about 731. Despite its focus on the history of the church, this work also provides valuable information about the early Anglo-Saxon kingdoms. For Wessex and Kent, Bede had informants who supplied him with details of the church's history in each province, but he appears to have had no such contact in Mercia, about which he is less well-informed. A further source for this period is the "Anglo-Saxon Chronicle", compiled at the end of the 9th century in Wessex. The "Chronicle"s anonymous scribe appears to have incorporated much information recorded in earlier periods.