A rough limestone block, 1.2m by 0.6m by 0.6m, (formerly) set behind railings outside Barclays Bank (nprn 26779) on the west side of St Peter's Square, recorded as being set in the middle of the street in 1699. A tablet reads "Maen Huail. On which tradition states, King Arthur beheaded Huail, brother of Gildas the historian." (Source OS 495 card; SJ15NW8). Possibly a market or civic stone, or a preaching stone.
J.Wiles, RCAHMW, 22.10.2002 and B.A.Malaws, RCAHMW, 29 June 2005.