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This is Coronelli's important 1690 map of Ethiopia (Abyssinia) showing the source of the Blue Nile. This map, focusing on Lake Tana (Tzana Dembea) covers the Ethiopian highlands from Derbeta on the Red Sea south as far as the tribal kingdoms of Sugame, Bahargamo and Gumar, all of which are located in modern southern Ethiopia. Europeans, Coronelli included, had a great interest in this region not only because of common conjecture regarding the source of the Nile, but also as a potential site of the Kingdom of Prester John. Though often underappreciated by historians, this is a highly significant map in the development of African cartography and, from the early 18th century on, most cartographers followed its example with regard to this important region - one of the few parts of sub-Saharan Africa to be accurately represented on maps prior to the late 19th century. Coronelli claims that this is the first map to accurately depict the sources of the Nile and, at least as regards the Blue Nile, we see no reason to dispute his claim. A number of the earliest Ethiopian towns, cities, monasteriesc,and kingdoms, many of which still exist, are in evidence. These include Axum, Asmara, Gojiam, di Cafate (Kaffa), di Ganz , di Dembea (north of Lake Tana), Tigre, di Amhara (welo), Ifat, Guraghe, Damot, Balli, Dawaro, Sugamo (Sidamo?), Angot, Bagemder and Midrabahr ( Bahrmedr), among others. Curiously the map does not name the early Abyssinian capital city of Gondar, though the tent encampment of the King is roughly identified in the same location. A decorative title cartouche appears on the lower right quadrant. Another cartouche, showing a no less than six distance scales adorns the lower left.