Chapter 18 The Karagwah.—Lake Ukereoue.—A Night on an Is-land.—The Equator.— Crossing the Lake.—The Cas-cades.—A View of the Country.—The Sources of the Nile.—The Island of Benga.—The Signature of Andrea Debono.—The Flag with the Arms of England. At five o'clock in the morning, preparations for departure commenced. Joe, with the hatchet which he had fortunately re-covered, broke the elephant's tusks. The balloon, restored to liberty, sped away to the northwest with our travellers, at the rate of eighteen miles per hour. The doctor had carefully taken his position by the altitude of the stars, during the preceding night. He knew that he