I had a very early set of Johnson's Scots Musical Museum, each volume signed by Alfred Moffat. I pawned them with a famous Scottish folk singer (who is now 'enobled') but he refused to give me them back. This was a long time ago and, in hindsight, I should have gone to the police as I had proof of purchase and our pawning agreement was by word of mouth. I am reminded of a statement by Walter Scott '.... none of my friends are mathematicians but some are very good book keepers'.