Unlocking the Liber visionum of John of Morigny.
by Estéban Trujillo de Gutiérrez
“….In the Liber visionum John of Morigny explains that each person who wishes to use the prayers of his book must copy his own volume by his own hand, substituting his name for that of John, and then consecrate the copy.
Of course, John is aware that his name is fairly frequent, and therefore he stresses that even those persons who are also called John must reproduce the book with their own hands if they really want to use it.”
–Benedek Láng, Unlocked Books: Manuscripts of Learned Magic in the Medieval Libraries of Central Europe, 2008, 183.