1257 First of January on Monday, MCCLVII, and the tenth day of the moon. Seventeenth year of the Solar Cycle; fourth year of the Decemnovennial Cycle; fifteenth year of the Indiction. Common year. G.
Conchobar son of Tigernan O Ruairc submitted to O Conchobair and his son and made peace, offering them their own choice of the territory of Brefne. The Stone-castle on Cherry Island in Loch Garradice was yielded to them, and Aed mac Fedlim meic Cathail put a garrison into it.
Cathal Cuircech (the Hairy or Tufted), son of Aed mac Cathail Chrobdeirg, and Aed son of Conchobar son of Aed mac Cathail Chrobdeirg were blinded in treacherous violation of [the guarantees of] the laity and clerics and of [oaths sworn on] the relics of Connacht this year, through jealousy and envy.
Conn son of Cathal O Raigillig, chieftain of the Muinter Mailmorda, died.
The Stone-castle of Cherry Island on Garradice Loch was burnt by O Ruairc, who allowed the garrison to depart under a promise.
Sitrecc son of Ualgarg O Ruairc was made king by Aed O Conchobair in opposition to Conchobar son of Tigernan O
Muiris Mac Gerailt died.
Fedlim mac Cathail Chrobdeirg met the Justiciar and Macwilliam Burke and the chief Galls of Connacht and the rest of Ireland by appointment at Athlone and they made peace.
Aed O Conchobair made a great raid on O Ruairc about Easter.
Mael Patraic Mac Eli, erenagh of Killala, was killed.
The castle of Caeluisce was thrown down by Gofraid O Domnaill and the Cenel Conaill and its garrison killed.
O Domnaill and the Cenel Conaill came to Sligo and killed many of the Galls there. They burned the town and took great preys in Carbury. The Galls came after them to Credran Coluim Cille in the Rosses of Carbury, and here they were routed. In this fight O Domnaill was wounded; and but for the constraint put upon him by his wounds the rout would have been followed up as far as the Moy; but on account of O Domnaill's wounding they [the Cenel Conaill] returned home after that [battle].
St. Mary's monastery in Roscommon was consecrated for the Preaching-friars by Tomaltach O Conchobair.
The King of England gave Fedlim O Conchobair a charter [confirming his right] to the five King's Cantreds.
Great war between Conchobar O Briain and the Munster Galls. O Briain killed many of the Galls and Tadc O Briain made great raids upon them. The Galls killed the son of Domnall Connachtach O Briain.
Mac Duinn Slebe slaughtered many of the Ulster Galls.
Conchobar son of Tigernan O Ruairc, king of Brefne, was treacherously killed at Ath na Failme by Gilla Beraig O Lamduib, who was one of his own men, and by the men of Matha O Raigillig.
Cathal O Mannachain died on the 26th of November.
Aed mac Fedlim violated Fenagh, that is, he took a hundred head of its cattle.
Muiredach son of Maelbrigde O Fairchellaig, coarb of Moedoc, rested.
The followers of the son of Fedlim O Conchobair made a great raid on Mag Samradain.
Tomas O Mailchiarain, a sage of Ireland, rested.
Ragnailt daughter of Amlaib O Fergail rested.
Gilla Patraic Mag Fiachrach was blinded by Matha O Raigillig this year.