An unexpected overnight visitor

We had a bit of a shock this morning when we discovered that during the night the Devil had shed one of his toenails in the conservatory.

Things aren't as bad as they sound; Devil's toenails are the fossilised remains of Gryphaea arcuata an ancient and extinct type of oyster that flourished in our seas some 200 million years ago. They are said to resemble the cloven hoof of old Nick, hence their name, and there was a common folk belief that carrying one of these fossils could prevent rheumatism.