The emblems of the more famous Emirs were easily distinguishable. On the extreme left the chiefs and soldiers of the bright green flag gathered under Ali-Wad-Helu; between this and the centre the large dark green flag of Osman Sheikh-ed-Din rose above a dense mass of spearmen, preceded by long lines of warriors armed presumably with rifles; over the centre, commanded by Yakub, the sacred Black banner of the Khalifa floated high and remarkable; while on the right a great square of Dervishes was arrayed under an extraordinary number of white flags, amid which the red ensign of Sherif was almost hidden. All the pride and might of the Dervish Empire were massed on this last great day of its existence. Riflemen who had helped to destroy Hicks, spearmen who had charged at Abu Klea, Emirs who saw the sack of Gondar, Baggara fresh from raiding the Shillooks, warriors who had besieged Khartoum--all marched, inspired by the memories of former triumphs and embittered by the knowledge of late defeats, to chastise the impudent and accursed invaders. The advance continued. The Dervish left began to stretch out across the plain towards Kerreri--as I thought, to turn our right flank. Their centre, under the Black Flag, moved directly towards Surgham. The right pursued a line of advance south of that hill. This mass of men were the most striking of all. They could not have mustered fewer than 6,000. Their array was perfect. They displayed a great number of flags--perhaps 500--which looked at the distance white, though they were really covered with texts from the Koran, and which by their admirable alignment made this division of the Khalifa's army look like the old representations of the Crusaders in the Bayeux tapestry. The attack developed. The left, nearly 20,000 strong, toiled across the plain and approached the Egyptian squadrons. The leading masses of the centre deployed facing the zeriba and marched forthwith to the direct assault. As the whole Dervish army continued to advance, the division with the white flags, which had until now been echeloned in rear of their right, moved up into the general line and began to climb the southern slopes of Surgham Hill. Meanwhile yet another body of the enemy, comparatively insignificant in numbers, who had been drawn up behind the 'White Flags,' were moving slowly towards the Nile, echeloned still further behind their right, and not far from the suburbs of Omdurman. These men had evidently been posted to prevent the Dervish army being cut off from the city and to secure their line of retreat; and with them the 21st Lancers were destined to have a much closer acquaintance about two hours later.