One of his journeys, in 1906, was made in the company of Sir Ralph Williams, Resident Commissioner, and was from Serowe to Livingstone and the Victoria Falls via Lake Ngami.
South of the divide some rivers flow into the Zambezi River system and thence to the Indian Ocean, others to the Okavango River (as the Cubango River is called along the border with Namibia and in Botswana) and thence to Lake Ngami and the Okavango Swamp in Botswana.
As a result of the expedition, he published Deutsch-Südwestafrika, Forschungsreisen durch die deutschen Schutzgebiete Groß- Nama- und Hereroland, nach dem Kunene, dem Ngamisee und Kalahari, 1884-1887 (German South West Africa: Research Expedition of Herero and Nama Country, the Kunene Region, Lake Ngami and the Kalahari- 1884-1887).
It is seasonally filled by the Taughe River an effluent of the Okavango River system flowing out of the western side of the Okavango Delta.
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