Promotion was rapid in the cavalry in those days, so soon after the war. Indians contributed largely to the general move, but there were other causes, too. Dean had served little over a year as second lieutenant in a troop doing duty along the lower Platte, when vacancies occurring gave him speedy and unlooked-for lift. He had met Mr. Folsom only once. The veteran trader had embarked much of his capital in business at Gate City beyond the Rockies, but officers from Fort Emory, close to the new frontier town, occasionally told him he had won a stanch friend in that solid citizen. "You ought to get transferred to Emory," they said. "Here's the band, half a dozen pretty girls, hops twice a week, hunts and picnics all through the spring and summer in the mountains, fishing _ad libitum_, and lots of fun all the year around." But Dean's ears were oddly deaf. A classmate let fall the observation that it was because of a New York girl who had jilted him that Dean had forsworn society and stuck to a troop in the field: but men who knew and served with the young fellow found him an enthusiast in his profession, passionately fond of cavalry life in the open, a bold rider, a keen shot and a born hunter. Up with the dawn day after day, in saddle long hours, scouting the divides and ridges, stalking antelope and black-tail deer, chasing buffalo, he lived a life that hardened every muscle, bronzed the skin, cleared the eye and brain, and gave to even monotonous existence a "verve" and zest the dawdlers in those old-time garrisons never knew.