It was midnight when they arrived, and they bivouacked outside the zereba in the square formation, every man lying down in the place he would occupy if the force were attacked, so that if the alarm sounded, he had only to snatch up his rifle and rise to his feet, and he was ready for anything.

But they were not disturbed, and rested till noon on the 12th, when dinner was eaten, and after it, at 1 p.m., they started once more to find the foe. As you draw cover after cover to find a fox, so in the desert you try watering-places when you are seeking game of any kind, quadruped or biped. And thus information was obtained that Osman Digna had a camp where all his forces were massed at Tamai, a valley well supplied with the precious fluid, nine miles from the zereba.

Once more was theory knocked over by experience. If there is one thing upon which most people feel quite confident about with regard to Egypt and the surrounding country, it is that the atmosphere is always perfectly clear, so that objects are only hidden from the eye by intervening high ground or the curve of the earth. For, as you probably know, anything on a (so called) level surface like the sea may be visible if the atmosphere allows it for ten miles, to a man on the same plane the shore say; but beyond that distance it gets so far round the globe we inhabit as to be hidden. Of course the taller it is the longer the top of it can be seen, as you will often perceive a ship’s top masts after the hull and lower spars have vanished.

Or, on the other hand, the higher the ground you stand on the further round the earth’s curve you can see; so that a man living on the top of a high mountain has a longer day than one on a flat, since the sun rises earlier and sets later for him.

But it was neither high ground nor the dip of the horizon which bounded the view of those quitting the zereba, but a thick, grey, British haze, which swallowed up everything a thousand yards in front, and out of which the Arab hosts might pour at any moment. The order of advance was different on this occasion, two squares instead of one being formed, the right under General Buller, and the left being commanded by General Davis. The guns were dragged with ropes by men of the Naval Brigade—a tug of war with a vengeance. The haze being so thick would have made it difficult to go straight for the enemy’s position had the information been as uncertain as was sometimes the case, but happily it had been ascertained that if they took a south-west course they could not go far wrong, and the compass came to their aid.

The cavalry marched in rear of the square, with the exception of the scouts, who with the Mounted Infantry explored the ground in front, preventing the possibility of a surprise. Tramp, tramp, mile after mile, hour after hour, plodded the two brigades, with many a halt to enable the man-drawn guns to keep with them. But tedium and fatigue were thought nothing of. The man who would consider a five-mile walk without an object a frightful infliction would think nothing of ten with a gun in his hand, and the chance of game getting up every minute. It is the same with all sports. How far across country could you run alone for the mere sake of exercise? And how far in a paper-chase, with the hare to run down and other hounds to compete with? Think how this stimulating excitement must be intensified when there is an enemy in front of you certain to fight well, and make you do all you know to beat him. After awhile the haze grew thinner, and a range of hills loomed through it in the distance.

As the atmosphere grew clearer these became distinct, and were seen to be low, while a higher range rose above them beyond. On towards the higher ground slowly moved the two brigades, with a total front of from 400 to 500 yards, the scouts spread in a cloud before them, and these were now amongst the spurs of the lower hills.

Presently a couple of them came galloping back with the report that these were clear of the enemy, who were massed further behind, and were watching the English advance. And then a group of mounted infantry were seen returning at a slower pace.

“Look!” cried Strachan, whose eyes were remarkably good; “they have caught some natives.”

And sure enough the troopers could presently be distinguished, coming on in a semi-circle, driving before them a group of men who were unarmed, and declared themselves friendly, or at least no adherents of the Mahdi, Osman Digna, or any votaries of the new Mohammedan heresy. This might be true, but the officer with the scouts thought the general had better decide so knotty a point, and so they were thus brought before him, travelling perhaps a little quicker than they were accustomed to, but otherwise uninjured.