Heynoe's loop

One Peter de Heynoe come to Sir Hugh Tyrell, then Captain of the Island, and told him he would undertake with his tiller bow to kill the commander of the French... which on leave he killed out of a loophole on the west side of the castle'
From Sir John Oglander's description of the French siege of 1377. This arrowloop on the west side of the castle has long been identified as Heynoe's loop in honour of the bowman.