In other words, Alfred succeeded to Ceolwulf's kingdom consisting of western Mercia, and Guthrum incorporated the eastern part of Mercia into an enlarged kingdom of East Anglia (henceforward known as the Danelaw). By terms of the treaty, moreover, Alfred was to have control over the Mercian city of London and its mints—at least for the time being. In 825, the "Anglo-Saxon Chronicle" recorded that the people of Essex, Sussex, Kent and Surrey had surrendered to Egbert, Alfred's grandfather. From then until the arrival of the Great Heathen Army, Essex had formed part of Wessex. After the foundation of Danelaw, it appears that some of Essex would have been ceded to the Danes, but how much is not clear.