But the third of Kitchener's lines of approach remains to consider. The surprise attack, which captured the riverside village of Firket, had eventually led, in spite of storms that warred on the advance like armies, and in one place practically wiped out a brigade, to the fall of Dongola itself. But Dongola was not the high place of the enemy; it was not there that Gordon died or that Abdullahi was still alive. Far away up the dark river were the twin cities of the tragedy, the city of the murder and the city of the murderer. It was in relation to this fixed point of fact that Kitchener's next proceeding is seen to be supremely characteristic. He was so anxious to do one thing that he was cautious about doing it. He was more concerned to obtain a success than to appear to deserve it; he did not want a moral victory, but a mathematical certainty. So far from following up the dash in the dark, upon Firket or Dongola, with more romantic risks, he decided not to advance on the Mahdi's host a minute faster than men could follow him building a railway. He created behind him a colossal causeway of communications, going out alone into wastes where there was and had been no other mortal trace or track. The engineering genius of Girouard, a Canadian, designed and developed it with what was, considering the nature of the task, brilliant rapidity; but by the standards of desert warfare it must have seemed that Kitchener and his English made war as slowly as grass grows or orchards bear fruit. The horsemen of Araby, darting to and fro like swallows, must have felt as if they were menaced by the advance of a giant snail. But it was a snail that left a shining track unknown to those sands; for the first time since Rome decayed something was being made there that could remain. The effect of this growing road, one might almost say this living road, began to be felt. Mahmoud, the Mahdist military leader, fell back from Berber, and gathered his hosts more closely round the sacred city on the Nile. Kitchener, making another night march up the Atbara river, stormed the Arab camp and took Mahmoud prisoner. Then at last he moved finally up the western bank of the Nile and came in sight of Omdurman. It is somewhat of a disproportion to dwell on the fight that followed and the fall of the great city. The fighting had been done already, and more than half of it was working; fighting a long fight against the centuries, against ages of sloth and the great sleep of the desert, where there had been nothing but visions, and against a racial decline that men had accepted as a doom. On the following Sunday a memorial service for Charles Gordon was held in the place where he was slain.