In 1225, Richard, 1st Earl of Cornwall traded with Gervase de Tintagel, swapping the land of Merthen (originally part of the manor of Winnianton) for Tintagel Castle [REF].
However, the dating to the period of Earl Richard has superseded Ralegh Radford's interpretation which attributed the earliest elements of the castle to Earl Reginald de Dunstanville and later elements to Earl Richard [REF].