Christmas Card 19 - Mouse

After some weeks, he had a visitor. A small mouse had found a way to his cell. He gave the mouse some of the dry bread. The mouse became a regular visitor, eating bread from the palm of his hand.
An idea struck him, if the mouse could get in, he must be able to get out as well. Maybe the mouse could carry a message to the outside world!
He tore a scrap of cloth from his shirt using a rusty nail that stuck out from the door-frame and, after a little thought, scratched his thumb on the nail and used the bloody spike to write a short message on the cloth. He then tied the rag around the mouse's middle.
But the mouse didn't seem to want to leave the supply of bread. And his scratched thumb began to throb. After two days, his whole arm was swollen and he had a fever. After five days, he was dead.

Christmas cards - from people whose names you don't recognise.