On the first of April, 1839, Dr. Grant left Oroomiah, expecting to meet Mr. Homes at Erzroom, who had been appointed to accompany him. An unusually late fall of snow made the journey perilous. For more than two hundred miles, it was from two to four feet deep; and for twenty miles, in the mountains beyond Ararat, there was not a single human habitation. In descending, the only way he could know when he was out of the path, was by the depth to which he sank in the snow. In the pass of Dahar, near the sources of the Euphrates, where Messrs. Smith and Dwight had well-nigh perished, the guide lost the path in a snow-storm, and declared it impossible to go on. The snow was too deep for the horses. Turning back was out of the question, as their tracks were obliterated by the wind, which would then be in their faces. Though benumbed and feeble, the courage of Dr. Grant did not fail. He could not tell how deliverance would come, but had a sweet assurance that God would send it, and encouraged his companions to new effort. Just then four mountaineers came tramping over the snow before them, and one of them consenting to turn back, they passed safely on foot, the man breaking down the drifts for the horses, and exploring the path by thrusting his long staff deep into the snow. He reached Erzroom on the seventeenth, and rested with his kind friend Dr. Riach, who had retired from Teheran, because of impending war between England and Persia. Dr. Grant's health had improved amid all his hardships.