The party always started early in the morning, so as to get the tents erected at the halting place before the main body of the Dervishes came up. On the march, they kept some distance from the river and, being but a small group, the gunboats did not waste their shot upon them; but each day there was a sharp exchange of fire between them and Mahmud's force.

Gregory supposed that Mahmud's plan was to cross the Atbara, which was fordable at several points, and to attack the fort there; in which case, he had no doubt the Arabs would be driven off, with much loss. The Sirdar was of the same opinion, and in order to tempt them to do so, he maintained only one Egyptian brigade in the fort, the remainder of the force being concentrated at Kennur, four miles away. From this point they would be able to advance and take the Dervishes in flank, while they were engaged in the attack of the fort.

Mahmud, however, was kept well informed of the movements of the troops, and instead of continuing his course down the river bank when he reached Gabati, he struck across the desert; and, after two days' march, crossed the Atbara at Nakheila. From this point, owing to the bend in the river, he would be able to march direct to Berber, avoiding the Atbara fort and the force gathered round it.

Altogether the desert march, although only lasting two days, was a trying one. The heat was overpowering, and even the ladies of the harem had the scantiest supply of water. They had, at starting, given Gregory a gourd of water for his own use. This he had taken sparingly, and it lasted him until they reached the Atbara.

It was now dead low water, and the river offered no obstacle to crossing, as the bed was for the most part dry, with pools here and there. The Arab encampment was formed in a thick grove of trees, which afforded some shelter from the sun.

Day after day passed. Mahmud was now informed as to the strength of the force he should have to encounter, and for the first time felt some doubt as to the issue of the fight. He determined, therefore, to stand on the defensive. This decision, however, he kept to himself. The Dervishes were burning to be led to the assault, and became almost mutinous, on account of the delay. Mahmud was obliged to take the strongest measures, and several of those who were loudest in their dissatisfaction were summarily executed. The rest were pacified with the assurance that he was only waiting for a fortunate day.

In the meantime, the men were employed in fortifying the position. Deep holes were dug along the edge of the wood, and behind these were trenches and pitfalls. Mahmud's own temper grew daily more sullen and fierce. His own fighting instinct was in favour of the attack his followers longed to deliver, but in his heart he was afraid that the result might be fatal. It was not the rifles of the infantry that he feared--of these he had no experience--but the artillery, which he had learned, already, could be used with terrible effect.

As Mahmud was drinking heavily, and as the fact that the white soldiers were near at hand added to the fanatical hatred of the emirs and tribesmen, Fatma sent a message by a slave to Gregory, warning him not to show himself outside the little shelter tent, composed of a single blanket, in which he now lived.

At length it became known that the English host was approaching. As soon as the gunboats brought down news that the Dervishes were no longer following the river bank, but were disappearing into the desert, the Sirdar guessed their intentions. Nothing could have suited him better. A battle now must be a decisive one. There was no way of retreat open to the Dervishes, except to cross the waterless desert; or to fly south, keeping to the course of the Atbara, which would take them farther and farther from the Nile with every mile they marched.

Bringing up all his force, therefore, from Kennur and the Atbara fort, which one battalion was left to guard, the Sirdar took up his post at Hudi. The position was well chosen. It lay halfway between Mahmud's camp at Nakheila and the Atbara fort, and left Mahmud only the option of attacking him; or of making a long detour, through the desert to the east, in order to reach Berber. The British, on the other hand, could receive their supplies by camels from the Atbara fort.