It was in 1819 that the great Pasha or Viceroy Mehemet Ali, still in name the lieutenant of the Sultan, ordered his sons Ismail and the more famous Ibrahim to extend his authority up the Nile, and conquer the Soudan. They do not seem to have experienced any difficulty in carrying out their instructions. Nobody was interested in defending the arid wastes of that region. The Egyptian yoke promised to be as light as any other, and a few whiffs of grape-shot dispersed the only adversaries who showed themselves. Ibrahim, who soon took the lead, selected Khartoum as the capital of the new province, in preference to Shendy, which had formerly been regarded as the principal place in the country. In this he showed excellent judgment, for Khartoum occupies an admirable position in the fork of the two branches of the Nile; and whatever fate may yet befall the region in which the Mahdi and his successor the Khalifa have set up their ephemeral authority, it is destined by Nature to be the central point and capital of the vast region between the Delta and the Equatorial Lakes. Khartoum lies on the left bank of the Blue Nile--Bahr-el-Azrak--rather more than three miles south of its confluence with the White Nile--Bahr-el-Abiad--at the northern point of the Isle of Tuti. The channel south of that island affords a slightly nearer approach to the White Nile, coming out immediately opposite the fortified camp of Omdurman, which the Mahdi made his headquarters and capital after the famous siege of 1884. There was nothing attractive or imposing about Khartoum. It contained 3000 mud houses, and one more pretentious building in the Governor's official residence or palace, known as the Hukumdariaha. It is surrounded by a wall and ditch, except where the Blue Nile supplies the need; and its western wall is not more than half a mile from the banks of the White Nile, so that with proper artillery it commands both rivers. The Nilometer at this place used to give the first and early intimation to the cultivators in Lower Egypt of the quantity of water being brought down from the rivers of Abyssinia. There seems no other conclusion possible than that sooner or later this practical service will compel Egypt, whenever she feels strong enough, to re-establish her power at Khartoum; already there is evidence that the time has arrived.