WWI - The Signal Service in the European War of 1914-1918 by R E Priestley, 1921. A comprehensive guide to the activities of the Royal Engineers signals corps during WWI. Rare t/w Shell Education Posters (10) - fine group of 10 original posters issued to schools by the Shell Oil Company in the 1950s/60s. Each poster features artwork by a leading illustrator of the time, together with an explanatory text, providing information on aspects of the countryside throughout the year. This collection covers most of the year, but lacks the months of June and July. Generally good condition, though there are a few creases and chips. Each measures 280 x 200 mm. (11)