Yule sailed for India with his wife in November 1843. The next two years were employed chiefly in irrigation work, and do not call for special note. They were very happy years, except in the one circumstance that the climate having seriously affected his wife’s health, and she having been brought to death’s door, partly by illness, but still more by the drastic medical treatment of those days, she was imperatively ordered back to England by the doctors, who forbade her return to India. Having seen her on board ship, Yule returned to duty on the canals. The close of that year, December, 1845, brought some variety to his work, as the outbreak of the first Sikh War called nearly all the canal officers into the field. “They went up to the front by long marches, passing through no stations, and quite unable to obtain any news of what had occurred, though on the 21st December the guns of Ferozshah were distinctly heard in their camp at Pehoa, at a distance of 115 miles south-east from the field, and some days later they came successively on the fields of Moodkee and of Ferozshah itself, with all the recent traces of battle. When the party of irrigation officers reached head-quarters, the arrangements for attacking the Sikh army in its entrenchments at Sobraon were beginning (though suspended till weeks later for the arrival of the tardy siege guns), and the opposed forces were lying in sight of each other.”[31] Yule’s share in this campaign was limited to the sufficiently arduous task of bridging the Sutlej for the advance of the British army. It is characteristic of the man that for this reason he always abstained from wearing his medal for the Sutlej campaign. His elder brother, Robert Yule, then in the 16th Lancers, took part in that magnificent charge of his regiment at the battle of Aliwal (Jan. 28, 1846) which the Great Duke is said to have pronounced unsurpassed in history. From particulars gleaned from his brother and others present in the action, Henry Yule prepared a spirited sketch of the episode, which was afterwards published as a coloured lithograph by M‘Lean (Haymarket). At the close of the war, Yule succeeded his friend Strachey as Executive Engineer of the northern division of the Ganges Canal, with his head-quarters at Roorkee, “the division which, being nearest the hills and crossed by intermittent torrents of great breadth and great volume when in flood, includes the most important and interesting engineering works.”[32]