In the shadow of the cathedral, behind the Deanery we found a book exchange.
It was late on a Sunday afternoon, two old gentlemen were shuffling their way through the boxes of books stacked in a small arched porch. Old travel guides, Sidney Sheldon novels, paperback Shakespeare, a guide to the art of the Hermitage from 1976. Printed signs indicated a recommended donation, which you dropped in through a slot in a door. Only good intentions and your conscience to keep you honest.
I traded a small contribution for an old "A New History of England".