 Exchequer Rolls from 1377 refer to a "fabricated iron gate", part of the defences for David's Tower in Edinburgh Castle.Yetts were also appearing in other castles at about the same time.Craigmillar, built soon after 1374, reputedly contained a yett, and Doune Castle (c. 1380) still retains its original double-leafed yett; a similar double-leafed yett is present at Balvenie, but its age is uncertain.