The length of navigable waterway accessible from Stanley Pool has already been proved to be more than 5,000 miles; and there are several important rivers which flow into the Congo, still to be traced to their ultimate points, besides tributaries of which we know nothing, save that their volumes promise long navigable channels into the interior. These unvisited waterways at a very moderate estimate will add another 1,000 or 1,500 miles to that wonderful system of natural canals which is destined to prove such an important factor in the civilization of this portion of Central Africa. So important are the facilities afforded by the Congo water system that, notwithstanding the increased distance involved, Mr. Stanley has taken advantage of them in making his attempt to relieve Emin Pasha, who is encamped at Wadelai on the Upper Nile; and if the proposed railway for connecting the Upper with the Lower Congo does but become an accomplished fact, these waterways will be the usual routes for communicating with the Central Soudan, Lakes Albert, Muata Nzige, and Tanganika, as well as with Nyangwe and the empire of the Muata Yamvo. The political event of importance which has transpired on the western boundary has been the delimitation of the frontier between the French territory and that of the Congo Free State, extending between to sea-coast and Manyanga, and also the bringing of the dividing line between the two from 17° East longitude to the right bank of the Mobangi. These disputed boundaries were matters with grave possibilities in their wake till the signing of the treaty settled the questions involved and removed all uneasiness. On the eastern side the loss of Stanley Falls Station and its occupation by the Arabs was for some time the source of great anxiety, but a treaty has been entered into with the principal Arab chief, and if its stipulations are but observed (and it will be to the interest of the Arabs to observe them), the result will by no means be so disastrous as was feared.