In Greek mythology, Phaethusa ("radiance") was a daughter of Helios and Neaera, the personification of the brilliant, blinding rays of the sun. With her sister, Lampetia, she guarded the cattle of Thrinacia[?].
... than anyone before him
John Hanning Speke, (1827-1864), discovered Lake Victoria
Henry Morton Stanley, (1841-1904), found back Livingstone; later explored Lake Victoria, ...