MacPhilpin, John, editor. 1880. The Apparitions and Miracles at Knock; Also, the Official Depositions of the Eye-Witnesses. New York: P. J. Kenedy, Publishers to the Holy Apostolic See, Excelsior Catholic Publishing House.

At the City University of New York's Institute for Irish-American Studies

Lovecraft mentions this book as among his "Occult" books in a 1933 letter to Robert Bloch (Lovecraft 1993: 17, letter 6)