Bucks, Chiltern Hills, Picture, Poster, Advertisement, Ad, Ads, Advert, Adverts, Posters, Advertising, London, Underground, Railway, Metro, Pictures, Transport, Country, Agriculture, Farming, Timber, Forestry, Sawing, 1938, 1930s, 1920-1939, Railway, Transport, Print, Illustration, Claire Leighton, Old, Classic, 20th Century, Chess Valley, Buckinghamshire, England, English, Britain, British, UK