"Donough Ó hEidhin was deprived of sight by the son of Cathal Crovderg, without the consent of the O'Conor" in 1212 but again there is no reference to this person ruling the territory.
While these events were taking place: the inhabitants of the southern side of Connaught ... were not in a state of tranquility at this period, for the English of Leinster and Munster, with Murtough O'Brien, the English of Desmond, and the sheriff of Cork, had made an irruption upon them, and slew all the people that they caught, and burned their dwellings and villages.
Hugh, the son of Cathal Crovderg, was displeased at their coming on this expedition; for it was not he that sent for them, but were themselves excited by envy and rapacity, as soon as they had heard what good things the Lord Justice and his English followers had obtained in Connaught at that time.
However, Aedh mac Ruaidri Ua Conchobair and Owen Ó hEidhin were alerted to this, and "went before them with a few select men, defeated the Momonians, deprived them of their spoils, and detained some of their nobles as hostages."
Aedh Ua Conchobair was restored but soon after his English supporters left the kingdom, Áedh Mór Ó Flaithbheartaigh with "all the other nobles, revolted against him, and joined the sons of Roderic."
Aedh sent his brother Felim Ua Conchobair with a mixed force of Irish and English "into Hy-Fiachrach Aidhne, to plunder Owen O'Heyne.
Ó Flaithbheartaigh and the Ó Conchobair's were en route to join Aedh mac Ruaidri when they received intelligence that "the English had gone to plunder their sworn partisan, Owen O'Heyne, and were stationed at Ardrahan, did not abandon their friend, but, with one mind and accord, followed the English until they came very close to them.
It was in 1232 that "The kingdom of Connaught was again given to Hugh, the son of Roderic", Owen's lord, and that de Burgh began building the castle of Galway.
At Ardcarne, "the English held a private consultation, at the request of Owen O'Heyne, who wished to be revenged on the Momonians, and on Donough Cairbreach O'Brien."
Returning to Connacht, Owen and the English, now joined by Áedh Mór Ó Flaithbheartaigh, found the kingdom desolate as Fedlim had ordered all its peoples to take themselves and their livestock out of their route.
Felim having received intelligence and forewarning of their design, departed from the assembly; and, attended by a few horsemen, proceeded to Roscommon.
As they did not overtake him they committed great acts of plunder upon Teige O'Conor, and carried away many respectable women into captivity and bondage; they then proceeded to Druim Gregruighe in Moylurg, where the Lord Justice awaited their return.
Felim (the King) strained his voice calling after his army, and commanding them to abandon the spoils and rally to fight their enemies.