human
Taking everything into consideration, in the present state of our knowledge, there is the strongest probability that the Lualaba is the head stream of the Congo, and the absolute certainty that it has no connection with the Nile or any other river (system) of the northern hemisphere. And again:
gpt
As surely as the sun stands over the southern hemisphere in our winter and the northern in our summer, bringing the rains and the swellings of the tropical rivers when it is in the zenith with regard to them, so surely can it be predicated, from a comparison of the rainy seasons and times of rising, that the Lualaba belongs to no river of the northern hemisphere; in the southern hemisphere Africa possesses only one river, the Congo, which could take up the vast water supply of the Lualaba.