Complex sentence: Little is known of Eorpwald's life or of his short reign, as very little documentary evidence about the East Anglian kingdom has survived: the primary source is the "Ecclesiastical History of the English People", written by Bede in the 8th century.
Split into simpler sentences: Little is known of Eorpwald's life or of his short reign, as very few records have survived from this period of history. The primary source for Eorpwald is the "Ecclesiastical History of the English People", written by Bede in the 8th century.