Early medieval cross-incised stone (thought to be 7th- to 9th-century in date), Mathry 3 (NPRN 423414) was found at Tregidreg in 1902, although its precise findsopt is unknown. Field name evidence indicates the presence of a chapel or cemetery. It has been noted that two fields on the north-west edge of the forms are depicted as `Parc-y-llan? on the 1842 tithe schedule, and a field immediately north of the farmstead is depicted as `Parc-y-bed? (`bed? probably deriving from `bedd? meaning grave). In addition, Dyfed Archaeological Trust identified a possible circular cropmark in parc-y-bed and another possible cropmark immediately east of the farmstead. First edition Ordnance Survey mapping depicts five stones in the fields immediately surrounding the farmstead, but their positions indicate that they were in use as cattle rubbing stones.

Sources include:
Cambria Archaeology, 2003, Early Medieval Ecclesiastical Sites Project, Pembrokeshire gazetteer

N Vousden, 11 October 2018