Mac Aodhagáin, who died around 1443, was a professor of Irish Brehon Law in Ormond. The sole surviving manuscript of the Fragmentary Annals, which is currently held by the Royal Library of Belgium in Brussels, is not in Mac Fhirbhisigh's hand, but in that of an anonymous scribe, who made a fair copy of Mac Fhirbhisigh's text, adding some marginal comments of his own and an index.
Mac Aodhagáin, a professor of Irish Brehon Law from Ormond, died around 1443. The only surviving manuscript of the Fragmentary Annals is held by the Royal Library of Belgium in Brussels. It was not written by Mac Fhirbhisigh himself but copied by an anonymous scribe who added their own notes and index to the text.