 A near-contemporary account of Æthelwig's life, or Vita, is included in the Chronicon Abbatiae de Evesham, the monastic chronicle for Evesham Abbey. This was a 13th-century work by Thomas of Marlborough, which was written to bolster the Evesham's case for exemption from the jurisdiction of the Bishops of Worcester, in whose diocese Evensham was. In order to do this, Thomas incorporated earlier works dealing with Evesham's history, including the work on Æthelwig. However, because of Thomas' purpose in composing the Chronicon, he probably altered some of the texts he included, and it appears that the life of Æthelwig was first incorporated into a complete history of the abbey and then that composit work was adapted by Thomas into his Chronicon. The main evidence for this is internal stylistic evidence, where the Æthelwig material is stylistic uniform with other material dating to prior to 1077, with information after 1077 forming a separate writing style.
