Relief shown by contours, form lines, spot heights. Most sheets were compiled by Major F. R. Maunsell. Some shwere revised and issued by the War Office. Geographical Section. General Staff. Topographic map series showing rivers, creeks, lakes, towns, villages, telegraph lines and offices, roads, tracks, and railways. Most sheets dated 1902; revised up to 1920. Some sheets originally classified "For official use only" or "Secret". Some issued by War Office. Geographical Section. General Staff. See series G.S.G.S. 2097 for western Turkey and the Balkans. . Includes index to adjoining sheets. Sheets 39 - 49 are distinct sheet some revised and named: Series G.S.G.S. 1522a. "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