My Grandmother swore by this remedy.
Rub a snail with a black shell on the warts and say,
"Wart wart, on the snail's shell black;
go away soon, and never come back."
Prick each wart with a needle, thrust it into an Ash tree and say:
“Ashen tree, ashen tree; pray buy these warts from me."
Cut a potato in half and rub one half on the wart. Nail a snail with a brown shell to your door and as it rots away so will the wart. Rub some bacon on the wart, then bury the bacon in your garden. Rub a small pea on the wart, fold it up in a piece of paper and bury it in moist ground. As the pea rots away, so will the wart.