(Photo: The Cat's Meat Shop)
In Nineteenth Century London, public toilets were rare. Well, it's better to say that officially sanctioned public toilets were rare. But that didn't stop people from peeing in alleys, on sidewalks on buildings.
Property owners sometimes responded by building contraptions which made peeing on the side of a building hazardous. Here's one at Clifford's Inn Passage off Fleet Street. This alley is specifically mentioned in Charles Dickens's novel Our Mutual Friend.