The African telephone was busy, as the steamer advanced, carrying the news up the river. The deep notes of the big drum, or tomtom, are the signal of great events in those parts, and crowds flocked to the banks long before the vessel puffed into view, straining their eyes for the first glimpse of anything wonderful or menacing. These signals, however, do not compare with the ingenious system perfected by a few small tribes in the Cameroons, West Africa, where the sounds on the drum represent syllables and words, and so grow into sentences, like the ticks of a telegraph instrument. Only about two hundred natives have been instructed in the art, and the secret is so carefully guarded that no white man is yet able to interpret these drum-beats, which carry verbal messages from one drummer to another as fast as sound travels. Far up the river Dr. Wolf discovered some remarkable houses built in the branches of trees. Many African tribes, like the people of New Guinea and the Solomon Islands, in the Pacific, build platforms high up in the trees, so that their lookouts may quickly discover the approach of an enemy, or their women and children take refuge among the branches in time of danger. An invention of the white men is destroying this custom of building tree refuges, and you can easily guess what it is. Traders have introduced many guns among the natives, and the women find that their rude perches in the air are no protection against bullets. But the tree houses Dr. Wolf saw serve a different purpose. The natives live in them to keep out of the wet when the land is flooded. A platform is firmly lodged in the widest fork of a tree, and a roof is built on the top of uprights that rest on the platform. The boys and girls are a happy lot when the floods subside and they can press the ground again with their bare feet. It was a joyous lot of black men whom Dr. Wolf restored to their homes in Angola, after they had served him well for many months while he was adding this river to the maps. But on the way home they had one serious disappointment. One day they saw a group of baobab-trees, the largest plant that grows in Africa. It was many a day since they had seen the familiar sight. "Hurrah!" they cried; "we are near the sea. We are in Angola again." But they were still far from Angola. These humble negroes helped to prepare the way for the busy white stations that are now planted on the Sankuru's banks. They should have their share of credit for the good work that was done. GAMES IN THE REAL COUNTRY. BY JNO. GILMER SPEED.