This is a giant, stony xylophone thing, that took Joseph Richardson 13 years to build, using hornfels slate from the Lake District. Supposedly, Queen Victoria witnessed performances of Handel, Mozart and Rossini's music on these "Musical Stones" that are currently stationed in the Keswick Museum and Art Gallery in Cumbria. If you visit this museum, by the way, you will not only be able to see it, but will also be invited to play it. What is most peculiar about this instrument is the fact that it gives out sound of different color. Some plates sound similar to a wooden xylophone, while others sound as if you hit a glass with a stick.