Places in Jane Shaw: the Mouse Tower

In Chapter 7 of Bernese Adventure, John points out the Mouse Tower to Sara as they drive from Koblenz to Bingen. He explains that the evil Bishop Hatto was eaten alive by mice there as punishment for burning poor people alive. During the burning, the bishop shouted "Hear the mice scream", according to local legend. He was attacked by mice and fled across the river to the tower (located on a small island). But the mice pursued him across and attacked him.