Look what I found in my local second-hand book shop. A perfect edition of Jane Austen's Letters collected and edited by Deidre Le Faye. Although it was priced at £8 the nice man in the shop said I could have it for £6. They don't do that in Waterstone's! He also told me an interesting anecdote about the time someone donated an extremely valuable early edition of an Austen novel to the shop without quite realising its value. He did the right thing and told them. I'm afraid I would have been tempted to keep quiet.
The full quotation on my cup is from Pride and Prejudice:
Follies and nonsense, whims and inconsistencies do divert me I own, and I laugh at them whenever I can.