Maps, 1914-1917, (fol. 1) North West Europe, Ordnance Survey/War Office, 1:250,000, Sheet 4, overprinting showing Allied progress on the front between Arras and the Aisne, Aug. 1914; (fol. 2) the Somme Front, Ordnance Survey, 1:40,000, overprinting showing British and German lines July 1916-Feb. 1917, Mar. 1917; (fol. 3) the Battle of Arras, Ordnance Survey, 1:40,000, overprinting showing British advances up to 10 Apr. 1917, Apr. 1917; (fol. 4) France, Lens, Sheet 11, 1:100,000, Ordnance Survey, 1915; (fol. 5) France, Amiens, Sheet 17, 1:100,000, War Office, Oct. 1915/Ordnance Survey 1916; (fols. 6-7) distribution of German Forces on the Western Front, 2 Feb. 1917, with printed note discussing number of divisions; and (fols. 8-11) Area east of the Fourth Army, Ordnance Survey 1916, with memorandum on intelligence, 16-31 Jan. 1917.