The plateau lay between two branches of the Piney. To the eastward of the smaller branch rose a high hill called Pilot Hill. West of it was another ridge which they named Sullivant Hills. Southwest of Sullivant Hills was a high ridge called Lodge Trail Ridge, the main branch of the Piney Creek flowing between them, so that the water supply was at the eastern or “Water Gate” of the fort. The Bozeman trail passed westward, under Pilot Hill in front of the fort, crossing the Big Piney as it neared Sullivant Hills, and then, circling around Lodge Trail Ridge for easier ascent, advanced northward, twice crossing Peno Creek and its branches, before that stream joined Goose Creek, a tributary to Tongue River, one of the chief forks of the Yellowstone. The first branch of the Peno was five miles from the fort, and the second twelve miles farther, where the garrison had to cut hay, but the branch nearer the fort was especially associated with the events of December 21st, as well as with the fight of the sixth of the same month. The spot was delightful. Adjacent to the fort were broad stretches of fertile, brilliantly flowered, grassy, river and mountain creek valleys. The mountains and hills were covered with pines. Game there was in plenty; water was clear and abundant. Wood, while not immediately at hand, else the place would not have been practicable of defense without tremendous labor in clearing it, was conveniently adjacent. General Carrington marked out the walls of the fort, after a survey of the surrounding country as far as Tongue River, set up his sawmills, one of them of forty horse-power, capable of cutting logs thirty inches in diameter, established a logging camp on Piney Island, seven miles distant, with no intervening hills to surmount, which made transportation easy, and began the erection of the fort. Picket posts were established upon Pilot and Sullivant Hills, which overlooked approaches both from the east and the road to the mountains. Three times Indians attempted to dislodge these pickets, once at night; but case-shot exploding over them, and each time causing loss of men or ponies, ended similar visitations. The most careful watchfulness was necessary at all hours of the day and night. The wood trains to fetch logs to the sawmills went out heavily guarded. There was fighting all the time. Casualties among the men were by no means rare. At first it was difficult to keep men within the limits of the camp; but stragglers who failed to return, and some who had been cut off, scalped and left for dead, but who had crawled back to die, convinced every one of the wisdom of the commanding officer’s repeated orders and cautions.[7] To chronicle the constant succession of petty skirmishes would be wearisome; yet they often resulted in torture and loss of life on the part of the soldiers, although the Indians in most instances suffered the more severely. One single incident may be taken as illustrative of the life of the garrison.