Why do knights fight snails in illuminated manuscripts?

The marginalia of illuminated manuscripts is weird. When monks weren't complaining about their jobs as they hand-copied line after line, they were inserting fart jokes into the margins. But one weirdly persistent image is of knights battling snails. Why? » 9/28/13 10:30am 9/28/13 10:30am

Who knew illuminated manuscripts contained so many fart and poop jokes?

There's plenty of silliness sitting in the margins of illuminated manuscripts, and the Tumblr The Discarded Image collects some of the goofiest of the goofy: cats licking their junk, murderous bunny rabbits, prankster monkeys, amorous animals, and tongue-wagging jokesters. But perhaps the highlight of blog is its… » 4/14/13 11:00am 4/14/13 11:00am