An hour after dark the horse had not turned up, though our own reliable animals were knee-haltered and turned loose for a time with their nosebags on as decoys. At dawn he was not visible in any of the shallow valleys we could see to the east of the ridge; and to our surprise and concern he was not in the valley where the water was and where the camp had been. Our own horses were knee-haltered short and let go, and we spent a careful hour examining the margin of the pool, but there was no narrow spoor to show that the roan had been down to drink during the night. I spent the morning with our horses and on the look-out, while the boy cut a wide semicircle round to the south and west of the water. He came in at mid-day, certain that the truant had not gone out in those directions. Then Frikkie took over the sentry work, and I set out to cover the remainder of the circle. I worked methodically along the soft ground of the valleys outside the range of the area already fouled by the spoor of our own animals, and where I would find the roan’s tracks at once. From time to time I climbed one of the low ridges, for the boy was to spread a light-coloured saddle blanket over a prominent rock on the side away from the water as a signal if he saw either the lost horse or anyone approaching from the south, or in case of other danger. Nothing occurred during the long, hot afternoon. That evening, when I got back to camp, I found two Griquas sitting over the coals with Frikkie. They said they were shepherds, and they may have done a little of that congenial work recently, but they looked to me more like sheep-stealers. They were wild people from the Orange River, and I was sure they had never been any sort of farm labourers. However, they were friendly enough and promised help in the morning. The horse had then been without water since the morning of the previous day. He had not strayed away, for at sunset he must have been still within four or five miles of the camp; if he had intended business we would have cut his outgoing spoor during the day. Horses were too valuable in that country and at that time for the loss of even such a three-cornered abomination as the pink horse to be taken lightly. Morning showed that the horse had not been to the water during the night. He had then been forty-eight hours without water. The only thing was to take up the spoor where the animal had last been seen, and so stick to it till he was found. The Kalahari bushmen have the reputation of being the finest trackers in South Africa, but these two cross-bred Griqua bushmen gave us an incomparable exhibition of skill. I have had some experience of that game, and Frikkie was a master, but these savages astonished us.