text: Essex reverted to Paganism again in 660 with the ascension of the Pagan King Swithelm of Essex. He converted in 662, but died in 664. He was succeeded by his two sons, Sigehere and Sæbbi. A plague the same year caused Sigehere and his people to recant their Christianity and Essex reverted to Paganism a third time. This rebellion was suppressed by Wulfhere of Mercia who established himself as overlord. Bede describes Sigehere and Sæbbi as "rulers […] under Wulfhere, king of the Mercians". Wulfhere sent Jaruman, the bishop of Lichfield, to reconvert the East Saxons.
  Wine (in 666) and Erkenwald (in 675) were appointed bishops of London with spiritual authority over the East Saxon Kingdom. A small stone chest bearing the name of Sæbbi of Essex () was visible in Old St Paul's Cathedral until the Great Fire of London of 1666 when the cathedral and the tombs within it were lost. The inscription on the chest was recorded by Paul Hentzner and translated by Robert Naunton as reading: "Here lies Seba, King of the East Saxons, who was converted to the faith by St. Erkenwald, Bishop of London, A.D. 677."
  Although London (and the rest of Middlesex) was lost by the East Saxons in the 8th century, the bishops of London continued to exert spiritual authority over Essex as a kingdom, shire and county until 1845.