For two days we marched through high dry grass, (about ten feet), when a clear night allowed an observation, and the meridian altitude of Capella gave latitude 2 degrees 45 minutes 37 seconds. In this interminable sea of prairie it was interesting to watch our progress south. On the following day our guide lost the road; a large herd of elephants had obscured it by trampling hundreds of paths in all directions. The wind was strong from the north, and I proposed to clear the country to the south by firing the prairies. There were numerous deep swamps in the bottoms between the undulations, and upon arrival at one of these green dells we fired the grass on the opposite side. In a few minutes it roared before us, and we enjoyed the grand sight of the boundless prairies blazing like infernal regions, and rapidly clearing a path south. Flocks of buzzards and the beautiful varieties of flycatchers thronged to the dense smoke to prey upon the innumerable insects that endeavoured to escape from the approaching fire. In about an hour we marched over the black and smoking ground, every now and then meeting dead stumps of palm trees blazing; until we at length reached another swamp. There the fire had terminated in its course south, being stopped by the high green reeds, and it was raging to the east and west. Again the tedious operation had to be performed, and the grass was fired in many places on the opposite side of the swamp, while we waited until the cleared way was sufficiently cool to allow the march. We were perfectly black, as the wind brought showers of ashes that fell like snow, but turned us into Ethiopians. I had led the way on foot from the hour we left Fatiko, as, the country being uninhabited for five days' march between that place and Kamrasi's, the men had more faith in my steering by the compass than they had in the native guide. I felt sure that we were being deceived, and that the woman Bacheeta had directed the guide to take us to Rionga's. Accordingly that night, when Canopus was in the meridian, I asked our conductor to point by a star the direction of Karuma Falls. He immediately pointed to Canopus, which I knew by Speke's map should be the direction of Rionga's islands, and I charged him with the deceit. He appeared very much astonished, and asked me "why I wanted a guide if I knew the way?" confessing that Karuma Falls were "a little to the east of the star." I thanked Speke and Grant at that moment, and upon many other occasions, for the map they had so generously given me! It has been my greatest satisfaction to have completed their great discovery, and to bear testimony to the correctness of their map and general observations.