Hippopotamus.
CHAPTER XXIII
After traveling ten days the caravan issued from the mountain pass and entered a very different region, an extended plain, mostly level, but broken here and there by small, wave-like hillocks. The vegetation was completely changed. No large trees towered above the waving, grassy plain. Only here and there, quite far apart, there sprang up rubber-acacias, with coral-colored and umbrella-shaped stems, but scanty foliage, and therefore furnishing but little shade. In some places between the ant-hills a species of euphorbia, with branches resembling the arms of a candlestick, grew taller than the grass. Hawks soared high in the air, and lower down black and white feathered crow-like birds flew from one acacia bush to the other. The grass was yellow and had ears li
