When Cenwalh returned to power, his Bishop in
Dorchester-on-Thames was the
Frank Agilbert. Bede states:At length the king, who understood none but the language of the
Saxons, grown weary of that bishop's barbarous tongue, brought into the province another bishop of his own nation, whose name was
Wini, who had been ordained in France; and dividing his province into two dioceses, appointed this last his episcopal see in the city of
Winchester, by the Saxons called Wintancestir. The new
diocese of Winchester, in lands formerly belonging to the
Jutes (who were thereafter confined to the
Isle of Wight) lay in the heart of the future Wessex. The ravaging of Ashdown by Penda's son
Wulfhere , in the original lands of the
Gewisse, suggests that this movement was brought about by sustained Mercian pressure on the Saxons. Wulfhere advanced as far south as the Isle of Wight, and detached the
Meon valley from Cenwalh's kingdom, giving it to his godson
Æthelwalh, King of the
South Saxons. At around this time, the Mercian prince
Frithuwold was ruling
Surrey and
Berkshire. Wulfhere's defeat at the hands of
Ecgfrith in 674 freed the southern kingdoms from Mercian control, and Wulfhere was defeated the following year by the West Saxons, led by
Æscwine. The
Anglo-Saxon Chronicle records a battle between Cenwalh and the Britons in its entry for 658: "Here Cenwalh fought at Peonnum against the Wealas and caused them to flee as far as the
Parret". The advance into the British south-west is obscure, but Cenwalh's relations with the
Britons were not uniformly hostile. He is reported to have endowed the British monastery at
Sherborne, in
Dorset, while the early
Anglo-Saxon missionary
Saint Boniface is said to have been born in
Crediton,
Devon, and educated at a formerly British monastery near
Exeter. Whether Cenwalh ruled alone in Wessex is uncertain. Earlier kings appear to have shared rulership, and
Cenberht, father of the future
King Caedwalla, may have ruled together with Cenwalh rather than being merely a sub-king. In 665–668, Cenwalh quarreled with Bishop Wini, who sought refuge with the Mercian king Wulfhere, which D.P. Kirby takes to be a sign of Wulfhere's influence. By this time, the Bishop at Dorchester was the Mercian-backed Ætla, and
Thame was a possession of Wulfhere's. According to the
Anglo-Saxon Chronicle, Cenwalh died in 672 and was succeeded by his widow,
Seaxburh, who held power for about a year. == Descendants ==