At the site of an earthwork marked 'Castell (Site of)' by the Ordnance Survey on Mynydd Morvil at SN 03355 31505, there are no remains. However a 60m-diameter semi circular enclosure bank, with traces of a ditch is visible some 100m to the south. Remains of medieval settlement elements to the east have been linked to it, but this may be an Iron Age defended enclosure, possibly the one said to have held the remains of a small cairn in about 1900. Local tradition speaks of a battle having been fought here (see nprn 405242).
Sources: OS 495 card: SN03SW10; RCAHMW Pembrokeshire Inventory, 1925, no.715.
J.Wiles, RCAHMW, 15.03.2002 & B.A.Malaws, RCAHMW, 31 October 2006.