William Ashton: The Evolution of a Coast-Line, Barrow to Aberystwyth and the Isle of Man, with Notes on Lost Towns, Submarine Discoveries, &C. Edward Stanford Ltd, London, ISBN 978-1-176-60264-9, 31. The Lost Cantref Gwaelod (openlibrary.org). (map illustration on page 257)
Brian Haughton: Haunted spaces, sacred places : a field guide to stone circles, crop circles, ancient tombs, and supernatural landscapes. New Page Books, Franklin Lakes, NJ, 2008, ISBN 1-60163-000-X, S. 100.
William Ashton: The Evolution of a Coast-Line, Barrow to Aberystwyth and the Isle of Man, with Notes on Lost Towns, Submarine Discoveries, &C. Edward Stanford Ltd, London, ISBN 978-1-176-60264-9, 31. The Lost Cantref Gwaelod (openlibrary.org). (map illustration on page 257)