Baring-Gould’s sources: Inserted by Baronins in the Roman Martyrology. The Irish Martyrologies on April 1st, and his deposition on April 4th. Authorities S. Bernard, Vit S. Malachi; the Chronicle of the archbishops of Armagh, and that of the Four Masters.] Celsus, whose real name was Ceallach, was a grandson of archbishop Moeliosa of Armagh, the predecessor of Donald MacAmalgaidh, by his son Aedh, and accordingly was a member of the family which had for so great a lapse of time usurped the possession of that great see. But although of that family, he was a real bishop, having been actually consecrated on the 23rd September, 1105, before he had reached the canonical age, being then only twentysix years old. This was due to the influence of his family, which had marked him out as successor to Donald MacAmalgaidh. He had been preceded in the possession of the see by eight married men not in Holy Orders; and it may well be supposed that the archdiocese had fallen into grave disorder. S. Bernard tells us that every part of Ireland was affected through this scandal with a great dissolution of ecclesiastical discipline and neglect of religion. Barbarism, he adds, amounting to a sort of paganism, had usurped Christian practices, and bishops were changed and multiplied without order or regularity, according to the mere pleasure of the metropolitan of Armagh, so that almost every parish church had a bishop of its own. S. Celsus laboured to remedy these sad disorders, by his exemplary conduct, charity, preaching, erection of churches, and by laying down rules of discipline and morality for the clergy and people. His first recorded act was to visit Ulster in 1106, a year after his ordination; but this seems to have been as much for temporal as for spiritual purposes,