The genealogies are presented in reverse order, beginning with a ruler at the time it was composed and naming each successive generation back to Wodin, and in the Lindsey and Wessex pedigrees, beyond.
[3][4] Dumville suggested specifically that the Historia used a Northumbrian precursor to the genealogical portion of the Anglian collection, provisionally dating its compilation to the 760s or 770s.
A single hand using Mercian script has recorded the genealogies and episcopal lists, bringing them down to the time of composition, 805 × 814 (probably closer to the end of that span).
The leaves containing the Anglian collection bear no resemblance to the remainder of the codex in which they were found, and probably were only bound together at the time they entered the Cottonian Library.
The Parker version of the Anglian collection is part of a larger volume all written by the same two scribes using an Anglo-Celtic hand, and including most notably Bede's Vita Sancti Cuthberti.
The volume is from the south of England and based in the writing was probably composed in the second quarter of the 11th century, though the chronological material in the regnal lists was most recently updated in the 990s.
The Wessex royal pedigree has been extended both more recently and earlier, giving a descent that traces the three sons of king Edgar (and hence dates 966 × 969) back to Adam.