- 1859 Map of Saundersfoot: NLW Picton Castle 1985 deposit, PG4241;,
- ICBS file no. 5953, Lambeth Palace Library;,
- Sir S Glynne in Arch. Cambr. V v (1888) pp. 134-5 (written 1867);,
- RCAHM Inventory, (1925) pp. 374-5;,
- Engraving possibly c.1860 (prospectus for restoration?); information from Mr K Daniels and Rev. Butler;,
- Dyfed Arcchaeological Trust S&M PRN 3642.,