Llys-Dulas is a derelict Victorian mansion destroyed in 1975. It was a Victorian Gothic style house set around an internal colonaded courtyard. A pointed-arch entrance led into a vaulted porch. Interior features included a possible seventeenth staircase and fitted shelving in the library with applique 'cavalier' masks in high relief. A tall, brick clock tower lay to the rear of the house.

Source: site file AN/Domestic/SH48 from an entry by A Parkinson

J Hill, RCAHMW, 19 November 2003