At midday the New Cavalry Brigade came to a halt at some mud holes, which furnished sufficient clayey water to allow the sobbing gun-teams and transport animals to moisten their mouths. Water for the men there was little, except the pittance which they were allowed to draw from the regimental water-carts. Neither was there shade from the merciless sun. The six inches of spare Karoo bush, though it served as a nibble for the less fastidious of animals, was useless either as bed or shade; other vegetable growth there was none within sight. Men crawled under waggons and water-carts if they were fortunate enough to find themselves near them, or, unrolling their blankets, extended them as an awning, and burrowed underneath. The oppression of that still heat! Fifty yards away the atmosphere became a simmering mirage; the outposts lost all semblance of nature's form, and stood out exaggerated in the middle distance as great blurs of brown and black. But it is only a passing inconvenience. In an hour or two the strength of that great, fiery, pitiless sun will be on the wane: if it were otherwise, then, indeed, would the Karoo be a desert. So you doze--it is too hot to sleep--and thank Fortune that you have not to march during the furnace hours of the day. And as you doze, parched and sweating, a little blue-grey lizard pops out from beneath the cart beside you, and, climbing gingerly up the stem of a solitary karoo-bush, surveys you with great, thoughtful, unblinking eyes. He is a complacent little beast, of wonderful skin and marking; and if it were not for the palpitation of his white waistcoat, it had been difficult to say he lived. You wonder if he too feels the heat. You think he does; for he opens his pink maw and sways his sprig of heather, to make for himself that breeze in the still air for which you are panting. You close your eyes, and smile to think that such a little thing as a karoo-blended lizard can interest you. A sound catches your ear: it is the upbraiding note of the bustard. Again and again you hear it. A covey of these birds must have been raised. As the clatter of their cry dies away, you distinguish the muffled strokes of a galloping horse. This is significant. No man in his senses would gallop in this heat unless his mission was serious. Nearer and nearer comes the horseman. You hate to move, though you hear the rapid breathing of the horse and the complaints of chafing leather. "Where is headquarters?" demands a voice in authority. Your dream and rest is over; for are you not the general's flunkey? You jump to your feet. "Where have you come from?" _Orderly_ (_as he hands in a written message_). "From the officer commanding the advance-guard." The message runs: "Patrol on left front reports large force of Boers, estimated 500 strong, to be behind the rise three miles to the right of the solitary flat-topped kopje on our left front. Patrol has fallen back upon me."