 While Speke and Burton were instrumental in bringing the source of the Nile to the wider world and were the first to record and map this section of Africa, the efforts and labors of Sidi Mubarak Bombay and Mabruki were instrumental in discovering the lake.Bombay was captured as a child near Lake Nyasa by slave traders and was sold to Indian merchants on the coast of Africa who took him to Sindh.Thus he spoke Hindustani and after his master's death he sailed back to Zanzibar where Speke and Burton met and hired him.