This pillow mound, one of three recorded on the top of Mynydd Esgair, is a low, linear, earthen mound on a gentle southeast facing slope. It measures 8 metres north northwest to south southeast, by 2 metres wide and 0.2 metres high, with slight gullies on either long side. The two other pillow mounds, NPRNs 535015 and 535016, lie 180 and 280 metres to its southwest. J.J. Hall, Trysor, 26 March 2014