The O'Dowds are unique in having left a detailed account of the inauguration ceremony of their Taoiseach (clan leader). This was written in an ancient manuscript known as the Great Book of Lecan, written near Enniscrone in Tireragh between 1397 and 1418 and now carefully preserved in Dublin. The inaugural ceremony of each succeeding O'Dowd was presided over by a MacFirbis, the hereditary chroniclers of the clan. One of the most generous sponsors of the MacFirbis scholars was Tadhg Riabhach O'Dubhda ('Dark Teige'), who became Taoiseach of Tireragh in 1417. He is particularly remembered in this manuscript where his death is recorded at Enniscrone Castle.