In Wessex, a bishopric was founded at Dorchester. The South Saxons were first evangelised extensively under Anglian influence; Aethelwalh of Sussex was converted by Wulfhere, King of Mercia and allowed Wilfrid, Bishop of York, to evangelise his people beginning in 681. The chief South Saxon bishopric was that of Selsey. The East Saxons were more pagan than the southern or western Saxons; their territory had a superabundance of pagan sites. Their king, Saeberht, was converted early and a diocese was established at London. Its first bishop, Mellitus, was expelled by Saeberht's heirs. The conversion of the East Saxons was completed under Cedd in the 650s and 660s. The continental Saxons were evangelised largely by English missionaries in the late seventh and early eighth centuries. Around 695, two early English missionaries, Hewald the White and Hewald the Black, were martyred by the vicani, that is, villagers. Throughout the century that followed, villagers and other peasants proved to be the greatest opponents of Christianisation, while missionaries often received the support of the edhilingui and other noblemen. Saint Lebuin, an Englishman who between 745 and 770 preached to the Saxons, mainly in the eastern Netherlands, built a church and made many friends among the nobility. Some of them rallied to save him from an angry mob at the annual council at Marklo (near river Weser, Bremen). Social tensions arose between the Christianity-sympathetic noblemen and the pagan lower castes, who were staunchly faithful to their traditional religion. Under Charlemagne, the Saxon Wars had as their chief object the conversion and integration of the Saxons into the Frankish empire. Though much of the highest caste converted readily, forced baptisms and forced tithing made enemies of the lower orders. Even some contemporaries found the methods employed to win over the Saxons wanting, as this excerpt from a letter of Alcuin of York to his friend Meginfrid, written in 796, shows: If the light yoke and sweet burden of Christ were to be preached to the most obstinate people of the Saxons with as much determination as the payment of tithes has been exacted, or as the force of the legal decree has been applied for fault of the most trifling sort imaginable, perhaps they would not be averse to their baptismal vows. Charlemagne's successor, Louis the Pious, reportedly treated the Saxons more as Alcuin would have wished, and as a consequence they were faithful subjects. The