Relief shown by hachures and spot heights. Caravan routes, Mr. Wakefield's route in 1865, and Messrs. Wakefield & New's route in 1866-7 are shown. "The names of Positions astronomically determined by, or from the information of scientific travellers (Burton, Speke & Decken) are engraved in a thick lettering; Positions inserted from the reports of Sadi Ben Ahedi and the missionaries (Erhardt, Rebmann, Krapf, Wakefield &c.) are shown in a thinner character; Reported districts of more doubtful position, in the lightest lettering." From: The Journal of the Royal Geographical Society of London. Vol. 40 (1870), pp. 303-39; held in Firestone Library. Call number: G7 .J687 v. 40 1870.