The mounted forces marched from Wad Hamed at dawn on the 27th and, striking out into the desert, skirted the rocky hills. Besides the 21st Lancers and nine squadrons of Egyptian cavalry, the column included the Camel Corps, 800 strong, and a battery of Horse Artillery; and it was a fine sight to see all these horsemen and camel-men trotting swiftly across the sand by squadrons and companies, with a great cloud of dust rising from each and drifting away to the northward. The zeriba of the camp at Royan had been already made and much of the ground cleared by the energy of the Soudanese division, which had been the first to arrive. An advanced depot was established at Royan island which was covered with white hospital tents, near which there was a forest of masts and sails. The barges and boats containing the stores and kits awaited the troops, and they had only to bivouac along the river-bank and shelter themselves as quickly as possible from the fierce heat of the sun. The dark hills of Shabluka, among and beneath which the camp and army nestled, lay behind us now. To the south the country appeared a level plain covered with bush and only broken by occasional peaks of rock. The eternal Nile flowed swiftly by the tents and shelters, and disappeared mysteriously in the gloom of the gorge; and on the further bank there rose a great mountain--Jebel Royan--from the top of which it was said that men might see Khartoum. The whole army broke camp at Royan on the 28th of August at four o'clock in the afternoon, and marched to Wady el Abid six miles further south. We now moved on a broad front, which could immediately be converted into a fighting formation. This was the first time that it had been possible to see the whole force--infantry, cavalry, and guns--on the march at once. In the clear air the amazing detail of the picture was striking. There were six brigades of infantry, composed of twenty-four battalions; yet every battalion showed that it was made up of tiny figures, all perfectly defined on the plain. A Soudanese brigade had been sent on to hold the ground with pickets until the troops had constructed a zeriba. But a single Dervish horseman managed to evade these and, just as the light faded, rode up to the Warwickshire Regiment and flung his broad-bladed spear in token of defiance. So great was the astonishment which this unexpected apparition created that the bold man actually made good his escape uninjured.