 Historian H. P. R. Finberg suggests that the foundation charter may have been drafted in the 9th century, based on some authentic material.Oswald's foundation of a monastery at Pershore is not stated explicitly in the charter, but the Worcester chronicle "Cronica de Anglia", written "c".1150, reports it under the annal for 683, and John Leland, consulting the now lost "Annals of Pershore", places the event around 689.