[1] Along with Brother Mícheál, Ó Cléirigh transcribed the years 1332–1608 in the annals.
He also wrote a poem on Mary, sister of Red Hugh O'Donnell, who died in 1662, which is now among the Phillips Manuscripts at the National Library of Ireland.
[2] He seems to have given material to Dubhaltach MacFhirbhisigh, which the latter inserted on page 299 of Leabhar na nGenealach His own principal work is the compilation known as the O'Clery Book of Genealogies.
He died at Gortnaheltia, in the valley of Glenhest at the foot of Nephin Beg, overlooking Lough Beltra.
It is believed that Cú Choigcríche's descendants are the Cleary and Clarke families of Brackleagh, Glenhest, Burrishoole, County Mayo.