John R. Kenyon is the Head Librarian of Amgueddfa Cymru - National Museum of Wales. He is one of the UK's leading authorities on castles, and has written and edited a number of books and academic papers on this theme. R. Avent was the Priccipal Inspector of Ancient Monuments and Historic Buildings, Cadw: Welsh Historic Monumnets.

John R. Kenyon is the Head Librarian of Amgueddfa Cymru - National Museum of Wales. He is one of the UK's leading authorities on castles, and has written and edited a number of books and academic papers on this theme. R. Avent was the Priccipal Inspector of Ancient Monuments and Historic Buildings, Cadw: Welsh Historic Monumnets.

John R. Kenyon is the Head Librarian of Amgueddfa Cymru - National Museum of Wales. He is one of the UK's leading authorities on castles, and has written and edited a number of books and academic papers on this theme. R. Avent was the Priccipal Inspector of Ancient Monuments and Historic Buildings, Cadw: Welsh Historic Monumnets.