Reverting to the Nile Valley Railway, it is gratifying to be able to say that the success already spoken of as having been attained in this direction was but a prelude to still more important developments that were to follow.

To prevent the carrying out of schemes which the Dervishes were known to be preparing for an invasion of Egypt, the British Government decided, early in 1896, to allow Egypt to resume occupation of the country along the Nile Valley abandoned at the time of the withdrawal in 1885, and on March 12, 1896, Sir Herbert (now Earl) Kitchener, who had succeeded to the command of the Egyptian army in 1892, received instructions to advance to the south from Wady Halfa. Akasha, the point to which the Nile Valley Railway had been built, was occupied on March 20, the Dervishes retreating to Firket.

As a means towards realising the objects of the expedition, Sir Herbert Kitchener resolved to continue the railway along the Nile Valley to Kerma; but this meant the construction of practically a new railway, since the Dervishes had torn up over fifty of the eighty-seven miles of the original line between Wady Halfa and Akasha, burning the sleepers and twisting the rails, while the remainder of the line was in such a condition that it required relaying. The work of construction was entrusted to a staff of Royal Engineers operating under Lieut. (now Major-General Sir E. Percy C.) Girouard, and it was pushed forward with great energy, the line being urgently required for the forwarding of stores to the front, and especially so on account of the impediments to navigation along the Nile due to the cataracts.

With the help of the railway, so far as it had then been restored, Sir Herbert Kitchener concentrated a force of 9,000 men at Akasha, and early in June he made a successful advance on Firket. The Dervishes retired to Dongola; but it was thought prudent, before following them up, to await a further extension of the railway. This was completed as far as Kosha, 116 miles from Wady Halfa, by August 4, 1896. Three weeks later some heavy rains, lasting three days, were the cause of floods which, in a few hours, destroyed twelve miles of the newly-constructed line. The repairs were completed in about a week, but in the same month there was an outbreak of cholera which carried off a large number of the working staff.

Utilising the railway as far as Kosha, Sir Herbert Kitchener concentrated the whole of his force at Fereig, on the north of the Kaibar cataract, and from thence a further advance was made to Dongola, which place the Dervishes made no attempt to defend.

The immediate purpose of the expedition had thus been attained; but, in the meantime, a further campaign had been resolved upon for the purpose of breaking down the power of the Khalifa and effecting the conquest of Khartoum. To this end the railway was continued another hundred miles, from Kosha to Kerma, which point was reached in May, 1897. Some 216 miles of railway had thus been completed in about thirteen months, notwithstanding interruptions which had led to very little progress being made during five months of this period, and notwithstanding, also, the fact that construction work had to be carried on simultaneously with the transport of troops and stores so far as the line had been completed.

Before, however, Kerma was reached, Sir Herbert Kitchener instructed the staff of the Royal Engineers to make a survey of the Nubian Desert with a view to seeing whether or not it would be practicable to build an alternative line of railway across it from Wady Halfa direct to Abu Hamed (a distance of 232 miles), thus giving a direct route to Khartoum.

A survey carried out at the end of 1896 showed that the work was not likely to present any unsurmountable engineering difficulties, and that the absence of water could be overcome by the sinking of wells. The only doubtful point was whether construction could be carried through without interruption by a still active enemy.

It was seen that the proposed desert line was likely to be of far greater importance, both strategically and politically, than a continuation of the Wady Halfa-Kerma line round the remainder of the Nile bend. The cutting off of this bend altogether would confer a great advantage on the Expeditionary Force. It was thus resolved to build the line, to run the risk of attacks by the enemy, and to push construction forward with the greatest energy.