¹⁸O'Donnell, Manus, Andrew O'Kelleher, Gertrude Schoepperle, and Richard Henebry. Betha Colaim Chille. Life of Columcille. Urbana, IL: University of Illinois under the Auspices of the Graduate School, 1918. 132.
The tale continues (my edits) “And that javelin grew in the place whereas it struck the ground that that time till now, and thus it shall be till Doomsday. Then Columeille blessed that stream, and its venom and enchantment departed therefrom. And he crossed it. And an angel brought him a round green stone, and bade him cast it at the demons, and they should flee before it, and the fog also. And the angel bade him throw his bell Dub Duaibseeh at them in like wise. And Columeille did as the angel commanded him, so that the whole land was yielded to him from the fog. And the demons fled before him to a rock out in the great sea opposite the western headland of that region. And Columcille cast at them that stone that the angel had given him, and his bell Dub Duaibsech. And he bade the demons go into the sea through the rock whereas they were, and be in the form of fish forever, and to do no deviltry against any thenceforth. …And lest folk should eat them, Columcille left a mark on them passing every other fish, to wit, that they should be blind of an eye and red. And fishers oft take them today, and they do naught to them when they perceive them, save to cast them again into the sea. Then required Columcille of God to give back to him his bell and stone from the sea. And lo, he beheld them coming toward him in the likeness of a glow of fire, and they fell to the ground fast by him….And in the place where the bell fell, it sank deep ill the earth, and it left its clapper there. And Columcille said the bell was none the worse without the clapper." This book may be read in its entirety here.

More than 400 years after Manus O'Donnell, Gleann Cholm Cille's Fr. McDyer made good use of the "evil fog" allegory when he reported on his battle with the bureaucrats in Dublin: "But the most powerful bodies were against me...The civil servants hedged by asking for feasibility studies. I reminded them about St. Colmcille and the druids and the efforts of the druids to thwart him by calling up the mists. I said: "The druids have gone but they have left their peers behind in you boys, the senior civil servants. The modern druidical mist is your feasibility study." McDyer, James. Fr. McDyer of Glencolumbkille. Dingle, Co. Kerry, Ireland: Brandon, 1982. 67.

Another brief quotation, supposedly from Colum Cille, was mentioned by Liam Price: "...it is written in early modern Irish, and was composed perhaps in the 15th century. It speaks of Senglenn Coluim, " the old glen of Colum, and of the old glen named from Colum. Na saruigbtear Seinglenn, aitreb na lee nime" ("The old glen will not be harmed, the place of the slabs of heaven.") Price, Liam. "Glencolumbkille, County Donegal, and Its Early Christian Cross-Slabs." The Journal of the Royal Society of Antiquaries of Ireland Seventh 11.3 (1941): 32.