In debt

The shame and disgrace continues. Yesterday I went to the library to return another book (a well written but pointless novel by Martin Amis, can't remember the title.) A shelfful of books was for sale: "fill a bag for £1". I selected three books, took them to the counter and opened my wallet - which contained nothing but a £20 note. The library is not set up to handle that kind of money, so the librarian kindly put an electronic note on my library card: owes £1. She said I could pay up the next time I came by. Poor gullible creature - she'll get into big trouble when I skip the country instead.