Recipes to Entertain in an Exeter Cathedral Library Manuscript

A marvellous operation of a lamp, which if any man shall hold, he ceaseth not to fart until he shall leave it.

Take the blood of a Snail, dry it up in a linen cloth, and make of it a wick, and lighten it in a lamp, give it to any man thou wilt, and say lighten this, he shall not cease to fart, until he let it depart, and it is a marvellous thing.