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 by Lieut. Colonel F.R. Maunsell, C.M.G., Chesney's Euphrates Expedition, 1837, Report on Navigation of Euphrates from Birijik to Feluja, by Mr. H.R. Dobbs, Indian Political Dept., Febry 1903, Sureys in Lower Mesopatamia by Sir. W. Willcocks, 1909-10, Miss G.L. Bell, 1909 & 1914." Correction, Oct 1917. With Glossary. Set complete, see index.