From Egyptian Secrets of Albertus Magnus, Joseph H. Peterson edition:
When a Splinter or Thorn is Sticking in the Leg.
Take a white garlic onion, cut it fine, take the same weight of pitch, render the pitch down and dissolve the onion therein until it becomes the thickness of a plaster, which must be put upon the sore spot, which will soon heal, and the thorn may be easily removed.
The grimoire Egyptian Secrets of Albertus Magnus lists this spell.