Ynys Gorad Goch - an island in the middle of the Menai Strait which has used weirs to trap fish on the outging tide for many centuries. The earliest known document relating to Ynys Gorad Goch is dated 1590.
At this time the island and its fishery was leased by the then Bishop of Bangor to a Thomas Fletcher of Treborth. He had to pay ‘Three pounds and besides one Barell full of hearinges at the tyme of the hearing fishinge’.
A later map refers to this as ‘Bishop’s Island’. There is a Bishop’s Room in part of the house which is an observation room, and above the centre window is a carving of a mitre, and below it, the inscription ‘I.R. 1808’