Abstract: Imprint:Photozincographed at the Office of the Trigonometrical Brach, Survey of India, Dehra Dún, C. Dyson, photo; C. G. Ollenbach Zinco.Distinctive Features:Relief shown by hachures.Shows route of the submarine telegraph cable laid in 1864 and 1867.Includes a note with details on the sources used in compilation of the map and a table listing chief tribes and provinces of Nejd.Physical description: Dimensions:470 x 950 mm