Lord Wolseley, early in November, considered that it would take to the end of the year to concentrate his forces at Ambukol, just above Old Dongola. He returned to Wady Halfa to expedite progress; and by the middle of December headquarters were established at Korti, and by Christmas the greater part of the force was concentrated there. During the whole of this period, Wolseley's army must be figured as a river of men flowing along the river Nile, the infantry struggling up in boats, the mounted men toiling along the banks; the stream of men banking up at headquarters, the military front, which is steadily pushed forward from Wady Halfa to New Dongola, from New Dongola to Old Dongola 60 to 70 miles farther up, from Old Dongola to Korti. On 17th November a letter was received from Gordon saying that he could hold out for forty days from the date of the superscription, 4th November, 1884, thus leaving Wolseley barely four weeks to accomplish a task needing as many months. On 28th November another letter from Gordon, dated 9th September, gave the relief expedition four months, thus leaving Wolseley five weeks from the {220} date upon which the letter was received. It was now clear that the expedition could not reach Khartoum in time. When Lord Wolseley, towards the end of December, had his forces concentrated at Korti, he decided to divide them into two columns, the Desert Column and the Nile Column. The reasons for his scheme can only be clearly apprehended by a reference to the map. At Korti, the Nile turns north-east, looping back again, and resuming its southward course at Metemmeh. A straight line drawn across the Bayuda Desert from Korti to Metemmeh is the short cut. This was the route given to the Desert Column. The Nile Column was to proceed up the loop of the river to Hamdab, there to avenge the murder of Colonel Stewart and his party, to proceed higher up to Berti, and thence to secure the bend of the river and to open up the desert route back to Korosko, below Wady Halfa, and from Korosko it was intended to attack Berber, and thence to join forces with the Desert Column at Metemmeh. The Nile Column, numbering about 3000 men, under the command of Major-General Earle, Brigadier-General Brackenbury being second in command, left Korti on 28th December, 1884. The Desert Column was placed under the command of General Sir Herbert Stewart. With him was Colonel Sir Charles Wilson, who was instructed to take a body of troops from Metemmeh to Khartoum. The Column consisted of sections of the Camel Corps, a company of the Royal Engineers, a detachment of the 19th Hussars, detachments of the Commissariat and Medical Corps, and the Naval Brigade, which was placed under the command of Lord Charles Beresford. The total force numbered 73 officers, 1032 non-commissioned officers and men, 2099 camels, and 40 horses. The Desert Column left Korti on 30th December, 1884. It was, in fact, a forlorn hope.