三角州
The first German trading post in the Duala area on the Kamerun River delta was established in 1868 by the Hamburg trading company . The firm's agent in Gabon, Johannes Thormählen, expanded activities to the Kamerun River delta. In 1874, together with the Woermann agent in Liberia, Wilhelm Jantzen, the two merchants founded their own company, Jantzen &amp; Thormählen there.