Back of the first horse came a second, similarly equipped, and then another tall, half-naked brave, armed with bow and arrows. Dick knew that the little procession was a portion of some Indian community moving their camp to a place where the game would be more abundant, for this was the season when they laid in their winter store of jerked venison or "pemmican." "Don't move yet, Roger," whispered Dick, after the last figure had gone some little distance along the trail; "I believe there is another party coming. Yes, I can already see them a little way back there. Just crouch down and watch." While the two boys are lying hidden, and waiting for the passage of the hostile Indians, belonging to some tribe with which they hitherto had had no dealings, we might take advantage of the opportunity to ascertain just who Dick and Roger Armstrong are, and what they could be doing in this unknown region, far back in 1804, when the headwaters of the Missouri had never been fully explored by any white man. Many years previous to this time their grandfather, David Armstrong, had emigrated from Virginia to the banks of the Ohio, being tempted to take this step because of wonderful stories concerning that country told to him by his good friend, the famous pioneer, Daniel Boone. His family consisted of three children, a girl and two boys, Bob and Sandy. The brothers grew up versed in woods lore, as did all border boys. They knew all about the secrets of the great forest and the mighty waters. And, indeed, in those days, with peril constantly hovering over their heads, it was essential that boys should learn how to handle a rifle as soon as they could lift one of the long-barreled weapons to their shoulder.[1] Later, the pioneer was tempted to continue still further into the Golden West, always with the rainbow of promise luring him onward toward the setting sun. With other families, the Armstrongs drifted down the beautiful Ohio, and finally settled on the Missouri, above the trading post of St. Louis. Here the two sturdy lads grew to manhood, married, and built cabins of their own, near that of old David and his wife. To Bob came two boys, Dick and Sam; while his brother had a son, Roger, and a sweet girl named Mary, after her grandmother. These two cousins, Dick and Roger, hunted in company, and were as fond of one another as their fathers had been. Dick was a little the older, and acted as a sort of safety valve upon the more impulsive Roger; but both learned the lessons of Nature, day by day, until, at the time we make their acquaintance in this volume, they were capable of meeting the craftiness of the Indian, or the fury of the forest wild beast, with equal cunning.