The Hippopotamus is found not only in the Nile, but in the rivers of southern Africa. In the former stream of marvels, Hasselquist relates that "the oftener the River Horse goes on shore, the better hope have the Egyptians of a sufficient swelling or increase of the Nile." Again, they say that the River Horse is an inveterate enemy to the crocodile, and kills it whenever he meets it; adding that he does much damage to the Egyptians in those places he frequents. He goes on shore, and, in a short space of time, destroys an entire field of corn or clover, not leaving the least verdure, for he is very voracious. Yet neither of these stories is so marvellous as that which a sailor related to Dampier, the old traveller:--"I have seen," says the mariner, "one of these animals open its jaws, and, seizing a boat between its teeth, at one bite sink it to the bottom. I have seen it, on another occasion, place itself under one of our boats, and, rising under it, overset it with six men who were in it, but who, however, happily received no other injury." Professor Smith and Captain Tuckey, in exploring the Congo River, in South Africa, saw in a beautiful sandy cove, at the opening of a creek, behind a long projecting point, an immense number of Hippopotami; and in the evening a number of alligators were also seen there; an association hardly consistent with the hostility related by Hasselquist. Captain Tuckey observed Hippopotami with their heads above the water, "snorting in the air." In another part of his narrative he says:--"Many Hippopotami were visible close to our tents at Condo Yanga. No use firing at these animals in the water; the only way is to wait till they come on shore to feed at night." Le Vaillant had an opportunity of watching the progress of a Hippopotamus under water at Great River, which contained many of these animals. On all sides he could hear them bellow and blow. Anxious to observe them, he mounted on the top of an elevated rock which advanced into the river, and he saw one walking at the bottom of the water. Le Vaillant killed it at the moment when it came to the surface to breathe. It was a very old female, and many people, in their surprise, and to express its size, called it the Grandmother of the River.