And when they stop, if those rats get off that ship, it's going to start infecting human beings. Eventually the ship is going to land in Sicily in October of 1347 and that's where the rats are really going to do their business, eventually affecting the whole island of Sicily. And from there it's just a transmigrating process. Then the fleas are eventually going to affect more humans. Those humans that are affected are going to start running away from those areas and spreading the fleas with them. And we're going to talk about some of the other contributing factors that are going to make it much, much worse. But by 1348 it's going to reach Great Britain.