- EDWARDS, N. 2007. A Corpus of Early Medieval Inscribed Stones and Stone Sculpture in Wales, 2, South-west Wales, Cardiff: University of Wales Press
- TURNER, R. 2000. Lamphey Bishop's Palace, Llawhaden Castle, Carswell Medieval House, Carew Cross, Cardiff: Cadw (second edn)
- KING, D. J. C. and PERKS, J. C. 1962. Carew Castle, Pembrokeshire, Archaeol. J., 119, 270–307