The fourth stage of Julia's journey is entirely devoted to one great valley, Swaledale in Yorkshire. Wainwright studied this 22-mile section in utmost detail, presenting a varied route of valley bottom and windswept moor top. The villages, landscape and the history are a delight, just as Wainwright predicted, with Julia learning much about the lost mining industry that was once the lifeblood of Swaledale.

• Julia Bradbury