The Berwinne sails off Leopoldville (now known as Kinshasa) up the Congo River. Along the way, it stops at a small village to take on board a plentiful supply of slow-burning wood. Once loaded, the boat sails away, leaving a mesmerised local population behind on the shore. Along the route, the boat encounters canoes and "watermen" carrying out typical activities such as fishing, crocodile hunting, carving hippopotamus meat and salting it for preservation.
Ernest Genval explores the scenery along the railway line that links Boma to Tshela in the Mayumbe area. The train passes through the lush and dense vegetation of the thick forests and stops by farm estates along the route like Lukula, the Urselia domain (a colonial manufacturer of cocoa powder and palm oil), Lubuzi River and its new bridge, the Kangu mission and Tshela, where manufactured products are loaded onto boats for shipment to Europe. The train journey is also an eyewitness account of the workings of a well-oiled colonial system and the development of the black workforce at its service.