Book of the Dean of Lismore

The Book of the Dean of Lismore (Scottish Gaelic: Leabhar Deathan Lios Mòir) is a Scottish manuscript, compiled in eastern Perthshire in the first half of the 16th century. The chief compiler, after whom it is named, was James MacGregor (Seumas MacGriogair), vicar of Fortingall and titular Dean of Lismore Cathedral, although there are other probable scribes, including his brother Donnchadh and William Drummond (Uileam Druimeanach), curate of Fortingall.

Source: Wikipedia — Book of the Dean of Lismore (CC BY-SA 4.0)