Gregorian Masses of Cormac mac Airt

On a time that Columcille was walking by the side of the river that is called the Boyne, the skull of a man was sent to him. And Columcille and the saints marvelled at the size of that skull, for it was far greater than the skulls of the folk of that time. Then said his household to Columcille:

“It is a poor thing for us,” say they, “to be without knowledge of
whose this skull may be, or where is the soul that was in the body wherein it dwelled.”

Columcille answered them and said: “I will not quit this place save
I get knowledge thereof for you from God.”

Then gan Columcille to pray God earnestly to reveal to him this
thing. And God heard that prayer of Columcille, so that the skull spake to him. And it said how it was the skull of Cormac mac Airt son† of Conn of the Hundred Battles, King of Erin and ancestor to himself. For Columcille was the tenth degree from Cormac. And the skull related that albeit his faith had not been perfect, yet such had been the measure thereof, and his keeping of the truth, that, inasmuch as God knew that Columcille would be of his seed, and would pray for his soul, He had not dammed him in very truth, albeit it was in sharp pains that he awaited the prayer of Columcille.

Then Columcille lifted up the skull and cleansed it right worshipfully. And he baptized it and blessed and buried it thereafter. And he left not the place ere he had said thirty masses‡ for the soul of Cormac. And at the last of those masses the angels of God appeared to Columcille, bearing with them the soul of Cormac to Heaven to enjoy glory everlasting through the intercession of Columcille.

Betha Colaim Chille (Life of Columcille),
X. Of Sundry Miracles and Prophecies of Columcille and of Certain Visions, 131; compiled by Manus O’Donnell in 1532; edited and translated from manuscript Rawlinson B. 514 in the Bodleian Library, Oxford.

† Cormac mac Airt was son of Art mac Cuinn and grandson of Conn Cétchathach (Conn of the Hundred Battles)
‡ The reference to “thirty masses” is likely anachronistic, as the custom of the thirty Gregorian Masses dates from A.D. 590, being established by Pope St. Gregory the Great at St. Andrew’s Monastery in Rome, originally restricted to the high altar of the monastery church, with the privilege later being allowed to other altars in Rome, and only centuries later extended to monasteries and churches throughout the world.

An Order of Malediction

The Cathach of St. Columba.
The Cathach of St. Columba.

Adomnán has also set down an order of malediction for them, to wit, a psalm for every day up to twenty days and an apostle or a noble saint for every day to be invoked with it, to wit, “Quare” and Peter, “Domine quid multiplicati” and John, “Verba mea” and Philip, “Domine Deus meus” and Bartholomew, “Dixit insipiens” and Thomas, “Deus, Deus meus respice” and Matthew “Iudica me Domine innocentium” and Jacob “Dixit iniustus” and Simon “Domine ne in furore” and Thaddeus, “Dixi custodiam”  and Mattias, “Deus deorum”  and Mark, “Quid gloriaris” and Luke, “Dixit insipiens”  and Stephen, “Exurgat deus” and Ambrose, “Salvum me” and Gregory of Rome, “Deus, venerunt gentes” and Martin, “Deus, quis similis” and old Paul, “Deus laudem” and George, “Audite caeli quae loquor,” “Non nobis, Domine, non nobis, sed nomini tuo,” &c.

— Cáin Adamnáin, xxxii.