He was already an adult poet in 1309, when he wrote a poem of 192 verses on the erection by the King of Connacht, Hugh McOwen O'Conor, in that year of a castle on the hill of Carn Fraoich or Carnfree in County Roscommon, An tu aris a raith Theamhrach (Do you appear again, O Fort of Tara).
He got drunk and offended the chief, whereupon to appease his lord's anger he composed a poem of 192 verses entitled: Ceangal do shioth riom a Ruadhri (Confirm thy peace with me, O Ruaidhri!
His grandson, Fearghal Ó Dálaigh, later composed a poem about the incident entitled Maith fear mar chách, a Chormaic.
The Annals of the Four Masters for 1367 state: Teige and Loughlin, two sons of Aengus Roe O'Daly, died.
The Annals of Loch Cé for 1350 state: Aenghus Ruadh O'Dalaigh, the most eminent poet in Erinn, quievit.