Gwynedd Archaeological Trust have found a 'system of cultivation terraces in the fields around Rhiwgaeron, extending half a mile south.' However, 'there has been very thorough agricultural clearance in the area, which has destroyed all evidence of early habitation.' Dr Toby Driver discovered evidence of prehistoric and later field systems on the site during the Royal Commission's programme of archaeological aerial reconnaissance on 2nd October 2015. Rhiwgaeron farm is situated approximately half a mile south east of Llwyngwril.
External source: Gwynedd Archaeological Trust database, reference number 4921.
M. Ryder, RCAHMW, 8th October 2018.