Rufiji River
Erhardt and Krapf went via Tanga, Kilwa, Lindi and Mikindani to Cape Delgado. The two missionaries, the first Europeans to investigate the coast in such detail, went unarmed and with few escorts, and were generally given a good reception by the Arabs, Swahilis and local people they met. They mapped the Pangani River's mouth, the delta of the Rufiji River and the Ruvuma River.