The seven camps of instruction are Zambi, for the Lower Congo; Kinshassa, Bolobo, Irebu, Kassongo, Umangi, La Romee, for the Upper Congo. The principal armed camps, as they are called (because they are bases of military power), are those at Lusambo, Bomokandi, and the Aruwimi; but Vankerckhovenville, Dungu, and Redjaf are now of equal, if not of greater, importance. At Kinshassa, on Stanley Pool, a fort with a battery has been constructed for the protection of Leopoldville and the railway terminus; and here an experiment has been successfully tried of utilising the services of prisoners of war. Men selected from the captives of the numerous expeditions have been passed through a probationary course on the works of this place, and in this manner a considerable number of recruits have been obtained for the Public Force on more favourable terms than the militiamen recruited through the chiefs. Kinshassa is not the only fortified place within the State territory; for at Chinkakassa, near Boma, a strong fort has been constructed, commanding the navigation of the Congo and the approaches from the ocean. Here Captain Petillon, of the Belgian Engineers, has placed eight Krupps and a number of smaller guns in an admirably selected position, while the Mongos tribe, from the Equateurville district, has supplied an adequate number of skilful and handy gunners. The authorities of the Congo State will experience no difficulty in procuring suitable men for this arm of their Public Force.