From the last outspan on the Notuane, at the junction of the Limpopo, mentioned in the last chapter, the road for eight miles is close to the bank of the Limpopo river, where I had some fishing, but instead of catching any fish, I caught a young iguana, two feet long, and had great difficulty to land him. It was necessary to kill the beast to release the hook. At the bend of the river the road turns north-west, and goes on to Ba-Mangwato. There are several cattle-posts at the bend belonging to Khama's people and the traders at that station; and also immense ant-hills, of the same kind as those at Motsodie. I measured one, twenty feet high and nearly sixty feet in circumference, made by these little white ants; my waggon looked quite small beside it. The climate here is very peculiar, hot sun, 99 degrees in the shade, with cold blasts of wind every four or five minutes in regular waves, reducing the heat to 70 degrees, which we feel very cold. This is one great cause of rheumatism and fever. To-day was almost melting with heat; I took shelter under the waggon, but had not been there three minutes when I had to get into the waggon, being so cold from the wind, which feels as if it came from a frozen region. If in a violent perspiration, fever comes on, if care is not taken to prevent a chill. The road from this place to Mongwato is fifty-five miles. In the dry season there are only three places where water can be obtained. On one of the tributaries of the Limpopo is a circular rock in the veldt, no other stones near it, fifteen feet in diameter, and similar in shape to a ball cut through the centre, and placed on the ground, only it belongs to the rock beneath the soil. This rock has been covered with carvings, the greater portion of which is nearly smooth by large animals rubbing against it, giving it quite a polish. Sufficient lines are left to show it has been well cut with some sort of figures, and on one side where it curves in a little, and is out of the way of elephants, rhinoceros, and other animals, the carvings are nearly perfect. They represent paths with trees and fruit on each side; upon one is a snake crawling down with a fruit or round ball in its mouth, near it is a figure, and a little distance off another figure with wings, almost like an iguana, flying towards a man who is running away; his left foot is similar to that of a horse, the right one has two points--evidently Satan; the intermediate spaces have many stars. The upper part of the stone has, in the centre, a small hollow of a cup-shape, with two circles of the same round the centre one. It is a very interesting monument, and appears to be very old, from the fact of the other portions being partly obliterated by the rubbing of animals against it. The rock is very hard and similar to those geologists call igneous. There are many rocks of the same description, with carvings of animals, snakes, and figures on them, and from their position they have