This style of life was of great benefit to him, and when he arrived at manhood he could bear any amount of cold, heat, hunger, thirst, or fatigue. Like the Yakout of the northern countries, he was made of iron. He could go four-and-twenty hours without eating, ten nights without sleeping, and could make himself a shelter in the open steppe where others would have been frozen to death. Gifted with marvelous acuteness, guided by the instinct of the Delaware of North America, over the white plain, when every object is hidden in mist, or even in higher latitudes, where the polar night is prolonged for many days, he could find his way when others would have had no idea whither to turn. All his father’s secrets were known to him. He had learnt to read almost imperceptible signs--the forms of icicles, the appearance of the small branches of trees, mists rising far away in the horizon, vague sounds in the air, distant reports, the flight of birds through the foggy atmosphere, a thousand circumstances which are so many words to those who can decipher them. Moreover, tempered by snow like a Damascus blade in the waters of Syria, he had a frame of iron, as General Kissoff had said, and, what was no less true, a heart of gold. The only sentiment of love felt by Michael Strogoff was that which he entertained for his mother, the aged Marfa, who could never be induced to leave the house of the Strogoffs, at Omsk, on the banks of the Irtish, where the old huntsman and she had lived so long together. When her son left her, he went away with a full heart, but promising to come and see her whenever he could possibly do so; and this promise he had always religiously kept. When Michael was twenty, it was decided that he should enter the personal service of the Emperor of Russia, in the corps of the couriers of the Czar. The hardy, intelligent, zealous, well-conducted young Siberian first distinguished himself especially, in a journey to the Caucasus, through the midst of a difficult country, ravaged by some restless successors of Schamyl; then later, in an important mission to Petropolowski, in Kamtschatka, the extreme limit of Asiatic Russia. During these long journeys he displayed such marvelous coolness, prudence, and courage, as to gain him the approbation and protection of his chiefs, who rapidly advanced him in his profession. The furloughs which were his due after these distant missions, he never failed to devote to his old mother. Having been much employed in the south of the empire, he had not seen old Marfa for three years--three ages!--the first time in his life he had been so long absent from her. Now, however, in a few days he would obtain his furlough, and he had accordingly already made preparations for departure for Omsk, when the events which have been related occurred. Michael Strogoff was therefore introduced into the Czar’s presence in complete ignorance of what the emperor expected from him.