'The Theatre of War on the Western Front', (c1920). 'Map Showing the Main Battle Lines from September 1914 to November 1918'. Northern France and Belgium during the First World War: also shown are: '1. Limit of German Advance up to First Battle of the Marne, September 1914. 2. Allies' Line In February, 1915 - six months after declaration of war 3. Before German Offensive, March 21st, 1918. 4 After German Offensive to July 15, 1918. 5. After Foch's Counter-attack on the Marne, July 18, 1918. 6. Battle for the Hindenburg Line, October 10th, 1918. 7. Armistice Lines, November 11th, 1918'. From "The Great World War: A History", Volume IX, edited by Frank A Mumby. [The Gresham Publishing Company Ltd, London, c1920]