Political difficulties for the Mission commenced at the very outset. Attempting to cross into Persian Seistan it was refused admission by the Persians, who had been thoroughly frightened by Russian misrepresentation as to its object. The cool assertion was made that no boundary was in dispute, and that any attempt to pass into Persian territory would be met by force. For a whole month the Mission contented itself with travelling along the Afghan side of the Helmund, collecting information in regard to the frontier line. Throughout this time there was no meeting with the Persian officials. Further work at last necessitated an entry into Persian territory. Notwithstanding Persia’s protests and her objection to the erection of a bridge for the purpose of crossing the Helmund, the Mission crossed, receiving the customary compliments and being welcomed with bands and guards of honour. The actual work of demarcation was very difficult. South of the Helmund for 90 miles the line lay through an arid desert where water was brought from long distances. North of this section the boundary traversed country liable to inundation in which pillars of a massive permanent nature had to be erected, while the last 20 miles of the frontier ran up the waterless, glacial slopes of the Siah-koh. By the decision agreed upon the old bed of the Helmund was retained as the new frontier, the present boundary being so fixed that it continues irrespective of further changes in the course of the river. This arrangement reconstitutes the 1872 line. Considerable delay marked its acceptance both in Kabul and Teheran, the findings being delivered in April 1904. Demarcation work, proceeding in accordance with McMahon’s report, was not completed until the close of 1904, by which time Persian objections to the decision upon the boundary had been overcome, the first part of the work of the Mission being settled absolutely when the final adhesion of the two Governments to the verdict of the Mission was notified in September 1904. The appropriation of the Helmund waters between Persia and Afghanistan was the second part of the business of the Mission. The difficulties of the question were increased by Russian exertions to thwart a satisfactory solution. Nevertheless, after most scrupulous pains and exhaustive inquiries into existing rights and practice, the Commissioners’ award upon partition of the waters was handed, in May 1905, to the Persian and Afghan representatives for communication to their respective Governments. The Amir of Afghanistan at once accepted the judgment of Colonel McMahon, while the people on the spot also warmly espoused the settlement. But Persia, inspired by the laboured concoctions of the Russian officials in Teheran, refused to ratify the protocol and, after great delay, confirmed her dissatisfaction at the distribution of the waters by direct representations to the British Minister at Teheran. Unhappily