From Egyptian Secrets of Albertus Magnus, Joseph H. Peterson edition:
An Ointment for the Fistula.
Take one pound of good bacon, one pound of saltpetre, one pound of gelder roses, and some verdigris. Pulverize all these articles fine and let the bacon melt in them. Temper all well together, and stir until it becomes cold and firm. It is approved.
The grimoire Egyptian Secrets of Albertus Magnus lists this spell.
Timeline of related events
1725Publication of Egyptian Secrets of Albertus Magnus (lists this spell)
1869English-language translation of Egyptian Secrets (lists this spell)