Saint Carthach was an Irish Bishop and hermit. After living as a swineherd he was ordained and became a hermit about 590 in Kiltulagh. Carthach eventually became one of the many saints and students in Bangor under St. Comgall. He founded the monastery in Raithean in County Offaly, was its first abbot. In 635 with 800 brother monks he established a monastery which eventually became the famous school of Lismore.
Here are some excerpts from the Life of Saint Mochuda of Lismore written in 1741:
"One day when there was a large meeting of people at a certain place in Kerry, the men and women who were present saw descending a fiery globe, which rested on the head of Mochuda’s mother, at that time pregnant of the future saint. The ball of fire did no one any injury but disappeared before it did injury to anyone. All those who beheld this marvel wondered thereat and speculated what it could portend. This is what it did mean: - that the graces of the Holy Spirit had visited this woman and her holy child unborn....
One day as Mochuda was keeping his herd as usual beside the river already alluded to, he heard the bishop and his clerics pass by, chanting psalms as they went along. The Spirit of God touched the boy’s heart and leaving his pigs Mochuda followed the procession as far as the monastery called Tuaim [Druim Fertain] [into which the clerics entered]. And as the bishop and his household sate down to eat, Mochuda, unknown to them, concealed himself - sitting in the shadow of the doorway. Meanwhile the king, Maoltuile, was troubled about the boy, noticing his absence [from the homestead at Achaddi] that evening and not knowing the cause thereof. He immediately sent messengers to seek the youth throughout the country, and one of these found him sitting, as indicated, in the shadow of the doorway of the bishop’s house. The messenger took Mochuda with him back to the king. The latter questioned him: - “My child, why have you stayed away in this manner?” Mochuda replied, “Sire, this is why I have stayed away - through attraction of the holy chant of the bishop and clergy; I have never heard anything so beautiful as this; the clerics sang as they went along the whole way before me; they sang until they arrived at their house, and thenceforth they sang till they went to sleep. The bishop however remained by himself far into the night praying by himself when the others had retired. And I wish, O king, that I might learn [their psalms and ritual].” Hearing this the king at once sent a message to the bishop requesting the latter to come to him...
Once, when the brethren were at work in the fields and in the kitchen, Mochuda went to the mill to grind meal for the monk’s use, and nine robbers, who hated him, followed with the intention of murdering him. The chief of the band sent each member of the gang to the mill in turn. Not one of them however could enter the mill because of a violent flame of fire which encircled the building round about, through the goodness of God protecting Mochuda from the robbers. The latter, through the mill door, watched Mochuda who slept portion of the time and was awake another portion. And while he slept the mill stopped of itself, and while he was awake it went of its own accord. The gang thereupon returned to the chief and told him all they had seen, which, when he heard, he became enraged. Then he hastened himself to the mill to kill Mochuda. But he experienced the same things as all the others and he was unable to hurt Mochuda. He returned to his followers and said to them - “Let us stay here till he comes out of the mill, for we need not fear that he will call help nor need we fear his arm.” Shortly afterwards Mochuda came out carrying his load. The robbers rushed on him, but they were unable to do him any injury for as each man of them tried to draw his weapon his hands became powerless, so he was unable to use them. Mochuda requested them to allow him pass with his burden and he promised them on his credit and his word that he should return to them when he had deposited the sack in safety. They took his word and he went, deposited his bag of meal in the kitchen, and returned meekly to martyrdom. The brethren imagined he had gone to a quiet place for prayer as was his custom. When he returned to the robbers they drew their weapons several times to kill him but they were unable to do so. Seeing this wonder they were moved to repentance and they gave themselves to God and to Mochuda for ever and, till the time of their death, they remained under his guidance and rule and many subsequent edifying and famous acts of theirs are recorded."