 Complete the following phrase:  During the Irish Confederate Wars the castle was besieged twice. In 1647 George Mathew, the guardian of the young Lord Cahir, surrendered to Murrough OBrien, 6th Baron Inchiquin later 1st Earl, and a descendant of Cahirs builder following his victory at the Battle of Knockauss. In 1650 he surrendered again to Oliver Cromwell, during his 