evidence: On the way, the Ruwenzori Range was revealed to explorers for the first time (identified as Ptolemy’s Mountains of the Moon), and the Semliki River was shown to link Lakes Edward and Albert; thus were cleared up the few doubtful geographic points regarding the Nile sources. In Darkest Africa (1890) is Stanley’s own account of his last adventure on the African continent. He received a Special Gold Medal from the RGS.