It is a message from the Hobbits. The handwriting looks like of 7-year old, so I think it's from Pipsqueak. A Message From The Hobbits I am writing to you with the courtesy of the Enemy. We are both alive and well. We are treated decently.
Food here is delicious and nourishing.
After this, we shall be released at proper time. DO NOT try to follow us. We're having a good time. Everyone fell silent for a while. Finally Aragon spoke.