 Complete the following phrase:  The castle was built on a rock overlooking the River Shannon by the OConnells. It was the seat of the chief of Hy-Cuilean, a territory south-east of Abbeyfeale, in the barony of Upper Connello near the borders of Cork and Kerry. The castle then came into the possession of the OBriens of Thomond. The castle was blown up by General Godert de Ginkel during the 