Diagrams comparing graticule lengths determined by calculation to those determined by measurement on the map sheets. Includes table of temperature and humidity during field survey. An English translation is at WOMAT/ADD/87/1/2/2.
Title translation: 'Route map Djibouti - Lake Rudolf.' Covers a 750-mile expedition corridor from Djibouti in French Somaliland south-westwards to the northern shore of Lake Rudolf in southern Abyssinia to a width of approximately 100 miles. Portrays hydrology, relief by form lines, roads, rail...
Three maps of parts of The Gambia relating to the Anglo-French frontier. 'Ernest L. Cowie. Major. 1/West India Regt. British Commissioner Anglo-French Boundary Commission Gambia - West Africa'