Label affixed: "Mouth of the Lunangwa River on the western Tanganyika coast, Congo State. The estuary with its steeply rising valley edges of up to 175 metres makes a fjord-like impression. The length of the estuary from the edge of the lake to the Alluvion is about 2 kilometres. The centre of the valley was plumbed at about 1 km; no bottom was reached at a depth of 170 m. It can therefore be assumed that the valley was formed by a transverse fracture. The edges of the valley consist of mottled quartz porphyry. The alluvion protrudes about 3 metres above the water and drops steeply to the east under water, so that anchoring the steamer was very difficult."