Great Britain. War Office. General Staff. Geographical Section. G.S.G.S. no. 1522a. Relief shown by form lines and spot heights. Some sheets from this set were revised and issued by War Office. Geographical Section. General Staff, published as G.S.G.S. no. 1522, 1522a. Series covers Mesopotamia and eastern Anatolian parts of Ottoman Empire. "Compiled for the Geographical Section, General Staff, War Office, by Lieut. Col. F.R. Maunsell, C.M.G. [from] Chesney's Euphrates Expedition, 1837, Report on Navigation of Euphrates from Birijik to Feluja, by Mr. H.R. Dobbs, Indian Political Dept. Feb. 1903, The East Bank of the Euphrates from Tel Ahmar to Hit, by Miss G.L. Bell 1909, 'Vom Mittelmeere zum Persischen Golf' by Max Freiherr von Oppenheim, 1893, Capt. T.C. Fowle I.A. April 1910, In Nordostarabien & Sudmesopotamien Prinz Sixtus von Bourbon & A. Musil, 1912." Addition, Apr 1917. With Glossary. Set complete, see index.