²²O'Kearney, Nicholas. The Prophecies of Ss. Columbkille, Maeltamlacht, Ultan, Seadhna, Coireall, Bearcan, Malacy, &tc, Dublin: John O'Daly, 1836. 7-8.
The author, whose text contains his own Colm Cille "prophecies" of dubious provenance, quotes the "Valley of the Black Pig" prophecy in order to decry its authenticity. This book may be read in its entirety here.