Royal Commission aerial reconnaissance on 11th July 2018, during the 2018 drought, revealed cropmarks of a rectangular enclosure on a prominent coastal hill overlooking Pwll Crochan, to the east of Porthgain. 

The enclosure is an irregular rectangle, measuring 60m x 30m, aligned due north-south; it narrows slightly from north to south. The enclosure is defined by a single ditch, except on the east side where this is a length of outer ditch. The site is not diagnostic and remains difficult to date. It may indeed be the 'Hen Llys' of the farm name some 500m to the south-west, but may prehistoric or medieval in origin. 

Image refs: AP_2018_4500-06

T. Driver, RCAHMW, Feb 2024.