Nature having done so much to impede the progress of the undertaking, it only remained for politicians and officials to do what they could to follow her example.
Mention has already been made of the initial prohibition of temporary lines of rails for the conveyance of stores and materials, and the loss of time and waste of money involved in the use of camels instead; but to this one fact may be added another, namely, that after the Engineer-in-Chief had made his arrangements to obtain sleepers from the juniper forests on the north of the line—this being the only timber available in the whole district—the Government vetoed the arrangement on the ground that it might, possibly, lead to quarrels among the Afghan tribes. The timber had to be procured from India, instead. Hence more delay.
Then the original arrangement with the Engineer-in-Chief, that the work was to be carried out under the Military Department of the Indian Government, and that, in the interests of urgency, he should have a free hand, was changed into one which required that the work should be controlled by a new member of the Public Works Department, who, it is alleged, interfered with many of the working details which should have been left to an Engineer-in-Chief, and, by his "unskilled and unqualified control," caused still further delay, together with much expense and confusion. A good deal of time was lost, for instance, before Col. Browne could get even some indispensable instruments and survey appliances. Especially persistent, also, was Col. Browne's immediate superior in demanding from him "detailed estimates" which, on account of the uncertainties of the engineering work and of the other factors in the situation, it was impossible to prepare whilst the construction of the line was in progress.
Such, however, was the energy which had been shown, in spite of all these difficulties and drawbacks, that the work was completed within the two years and a half fixed by the Engineer-in-Chief at the start as the period in which—"with money freely granted"—it could be done. On March 27, 1887, an engine ran over the line all the way from Sibi to Quetta, and the Hurnai Railway was formally declared open for traffic.
In the meantime the apparent certainty of war with Russia, following, especially, on her seizure of Penj-deh, had led, in April, 1885, to an order being given for the construction of a light railway from Sibi through the Bolan Pass to Quetta, as an alternative, more direct and more quickly constructed route, of which use could be made for a movement of troops to the frontier on the anticipated partial mobilisation of the Indian Army.
The laying of this light railway constituted another notable engineering achievement.
Running through the heart of what has been described as "some of the boldest mountain scenery in India," the Bolan Pass has a length of about sixty miles and a breadth ranging from one mile to a space, in places, of only about twenty yards between the rugged mountain walls which here convert the pass into a mere defile. The pass is, in fact, practically the bed of the Bolan River, and is dry for the greater part of the year, but liable to floods. The temporary narrow-gauge line was to be laid along the river bed without interfering with the military road constructed in 1882-84 as far as Quetta.
For the first forty miles there was a fairly good gradient; but beyond that came a very heavy rise to the top of the pass; and here, at least, anything more than a metre-gauge line would have been impracticable. The possibility of constructing a line of railway through the pass at all had long been the despair of engineers, and this was the reason why the Hurnai route had been decided on in preference to the Bolan for the broad-gauge line to Quetta. Unfortunately, too, the climatic were even greater than the engineering difficulties. The heat in the lower parts of the pass was "beyond all description," and cholera or other diseases carried off thousands of the workers.
With these two lines at their disposal, the Government were, in the spring of 1887, quite prepared for a concentration of British and Indian forces in Afghanistan, had the political condition rendered such a course necessary; but the situation had by then greatly improved, thanks to the negotiations which had been proceeding with Russia for the demarcation of frontiers. In April, 1877, the British and Russian commissioners met at St. Petersburg, and, as the result of still further negotiations, the questions at issue were settled without the appeal to arms which had at one time appeared inevitable.
In 1892 some fifty miles of the Bolan light railway were abandoned in favour of another route which, avoiding the first part of the pass, allowed of a broad-gauge line being laid from Sibi through Quetta to Bostan Junction, where it connects with what is now known as the Hurnai-Pishin Loop. A branch ninety miles in length, from Quetta to Mushki, on the Seistan trade route, was opened in 1905.