Question: What manuscript survived the medieval Welsh poem consisting of a series of elegies to the men of the Brittonic kingdom of Godddin,  who fought a battle around AD 600 between a force raised by the Gododdin, a Brythonic people of the "Hen Ogledd" or "Old North" of Britain, and the Angles of Bernicia and Deira?
Sentence (from "Battle of Catraeth"): It was evidently an assault by the Gododdin party on the Angle stronghold of Catraeth, perhaps Catterick, North Yorkshire.
Relevant evidence: No