At last the floods fell, and he began his forward movement, fighting his way against detached bodies of slave-hunters, but after each success receiving the welcome of the unfortunate natives, of whom Suleiman had consigned not fewer than 10,000 in the six previous months to slavery. At last Gessi was himself compelled to halt at a place called Dem Idris, fifty miles north of the fort which Suleiman had constructed for his final stand, and named after himself. These places are about 200 miles south of both Dara and Shaka, while between them runs the considerable stream called Bahr Arab. Gessi was now in close proximity to the main force under Suleiman, but he had to halt for five months before he felt in any way equal to the task of attacking it. During that period he had to stand on the defensive, and sustain several attacks from Suleiman, who had made all his plans for invading Darfour, and adding that province to the Bahr Gazelle. The first of these engagements was that fought on 28th December 1878, when Suleiman, at the head of 10,000 men, attacked Gessi's camp at Dem Idris. Fortunately, he had neglected no precaution, and his regulars, supported by a strong force of friendly natives, nobly seconded his efforts. Suleiman's force was repulsed in four assaults, and had to retire with a loss of 1000 men. But Gessi's difficulties were far from removed by this victory. Suleiman's losses were easily repaired, while those of Gessi could not be replaced. His men were also suffering from fever, and the strain on himself, through the absence of any subordinates to assist him, was terrible. It was a relief to him when Suleiman delivered his second attack, fifteen days after the first. On this occasion Suleiman appealed to the religious fanaticism of his followers, and made them swear on the Koran to conquer or die; and the black troops, as the less trustworthy, were placed in the van of battle and driven to the assault by the Arabs. Gessi made an excellent disposition of his troops, repulsing the two main attacks with heavy loss; and when the attack was resumed the next day, his success was equally complete. Unfortunately, Gessi was unable to follow up this advantage, because his powder was almost exhausted, and his men were reduced to pick up bullets from the field of combat. Tidings of his position reached Suleiman, who made a final attack on the 28th of January 1879, but owing to the fortunate arrival of a small supply of powder, Gessi was able to fight and win another battle.