1. Ordnance Survey entry (NAR SN14SE6): An uncertain earthwork promontory enclosure, set within a field known as 'Y Gaer' & set over 'Gaer Wood': a north-east facing bank, or degraded rampart of uncertain antiquity, cuts off the generally level summit of a steep-sided promontory, about 115m north-east to south-west by 50m, tapering to the south-west.
2. Record of site visit by Dyfed Archaeological Trust in 2007 for the Cadw-funded Defended Enclosures survey: DAT1175 . Named Gaer, but scheduled as Penralltddu Defended Enclosure.
3. LiDAR data shows this univallate inland promontory fort dominating a spur between the Afon Piliiau on the north and a pronounced dry valley on the south. It is defended by a remarkably straight eastern rampart, with scarped defences defining the perimeter of the rest of the fort. The fort measures 125m x 57m and encloses 0.65 hectare. These inland minor valleys south of the Teifi corridor feature a number of other small inland promontory forts of Iron Age or Romano-British character.
Dr Toby Driver, RCAHMW, June 2025