We had been searching for some time, and at Mango's suggestion I had mounted the ox. I have not before described the animal. It was clean-limbed, almost white, with long pointed horns projecting horizontally from its head; a thoroughly tame and tractable animal. It went on at a steady pace, sufficient to keep Mango and the zebra at a trot. We were searching carefully as we went for Leo's promised indication of his route, when Mango suddenly started off, and running a few paces, lifted up a small cross, formed of two pieces of wood, fastened together by the material of which the natives make their mats. Mango's delight was excessive. "See I see!" he exclaimed. "We now find--we now find Massa Leo!" and running on ahead, he lifted up a second cross made in the same way. The arms of both of them were pointing in the direction which we supposed Leo had taken. This fact also showed his forethought, for if a single cross only had been left, we should have had to search about perhaps for a long time before ascertaining his route. We now went on with more confidence. From the start he had had, I feared it would be some time before we could come up with him. Still, as he had his rifle and provisions to carry, I knew that he could not proceed as fast as we were doing. We travelled on till nightfall, when we tethered the animals with some rope which Mango had brought, lighted our fires, and made a slight shelter from the wind. As the weather was clear, there was no necessity for building a substantial hut. Having unloaded the zebra, I placed the packages under my head as a pillow, keeping my rifle as usual by my side, and told Mango that we would watch alternately during the night. I gave him the first watch, with directions to call me after a couple of hours, intending to allow him a longer rest than I took myself. I was awoke by a loud roar sounding in my ears. It was the well-known voice of a lion. I started up. So did Mango, for he had been asleep. A few glowing embers of the fire alone remained. I had seized my rifle instinctively, and with it in my hand looked around on every side. The ox stood near, though trembling violently; but the little zebra was nowhere to be seen. I caught sight, however, of the massive form of a lion bounding over the ground. The zebra, I hoped, had escaped, though the lion might be pursuing it, and I resolved to try and save the life of our little pet. I fired, and believed that I had hit the savage brute, for it stopped and growled more furiously than before. Meantime Mango was employed in throwing sticks on the fire, blowing with might and main to make them blaze up. The lion drew nearer. Again I fired, but missed. There might be scarcely time to reload before the lion would be upon me. I hurriedly began to do so. I never more eagerly rammed down a charge. Still the lion came on. Mango piled on more sticks, and blew and blew harder than ever, as if his existence depended on it.