Here he led a life of great austerity until he was commanded by an angel to remove thence to the west of the River Barrow, for there he was to find the "place of his resurrection." He was directed to build his refectory where he should meet with a boar, and his Church where he should see a hind. Fiacc, however, was unwilling to go there without the sanction of St. Patrick. So Patrick himself came and fixed the site of his Church at Sletty (Sleibhte), and there Fiacc and his son Fiachra were afterwards interred, the two saints in the same grave. Sletty is about one mile and a-half north-west of Carlow, on the right bank of the River Barrow. It takes its name "the Highlands," from the hills of Slievemargy, in Queen's County, which have also given their name to the entire barony. Daring the devastations of the Danes, Sletty being so near a large river, was almost totally destroyed by the frequent incursions of those marauders. A portion of the old church still remains, but the See of Sletty was long ago transferred to Leighlin, which is still the name of the diocese. In his monastery of Sletty, Fiacc presided over many monks, his disciples, and continued to lead the same austere life, as at Donoughmore. He was at once abbot of the monastery at Sletty, and besides performed his episcopal functions through all the surrounding country. Moreover, he was wont every year, at the beginning of Lent, to retire to a lonely cave at Drum Coblai, taking with him a few barley loaves, which were the only food he used, with water from the spring, during all the days of Lent, until he returned to his monastery to celebrate with his brethren the great festival of Easter. This cave of Drum Coblai has been identified with a remarkable cave at the base of the north-east escarpment of the hill called the Doon of Clopook, about seven miles north-west of Sletty, and a little to the east of the old and famous monastery of Timahoe. Near at hand there is an ancient church and graveyard, and it is said that a dim tradition still lingers in the neighbourhood, of a saint, who used to retire to this cave to fast and pray alone with God. As no person could see him leave the cave, he was supposed to return to his own church further south by a subterranean passage, which is believed to be still in existence, although no one can ascertain its whereabouts. During a great portion of his episcopal life Fiacc suffered much from a fistula, or running sore, near his hip-joint, so that he was unable to walk except with much pain and difficulty. St. Patrick commiserating Bishop Fiacc's infirmity, sent him all the way from Armagh a present of a chariot and horses. But Fiacc in his great humility was unwilling to accept the gift, until an angel appeared to him, and assured him that Patrick sent him the chariot and horses because he was acquainted with the sore infirmity, from which Fiacc suffered, and wished to relieve him. Then Fiacc reluctantly consented to ride in the chariot.