 After returning from exile, Æthelbald of Mercia succeeded Coelred and afterwards endowed the church at Crowland. Ælfwald's friendly stance towards Æthelbald helped to maintain peaceful relations with his more powerful neighbour. The Life of Guthlac, which includes information about Æthelbald during his period of exile at Crowland, is dedicated to Ælfwald. Later versions of the Life reveal the high quality of written Old English produced in East Anglia during Ælfwald's reign. He was a literate and devoutly Christian king: his letter written to Boniface in around 747 reveals his diplomatic skills and gives a rare glimpse into the life of a ruler who is otherwise shrouded in obscurity.
