Disgrifiad
Glamorgan Gwent Archaeological Trust report, "Old Cogan Hall Farm, Penarth, Vale of Glamorgan: archaeological evaluation on Scheduled Ancient Monument" by S H Sell for Parsons Brinkerhoff, dated August 2002. GGAT report no. 2002/056; GGAT project no. A733; Scheduled Ancient Monument no. GM535(GLA).
