Excerpt from the opening Note: "The following narrative is based upon an episode taken from that much neglected portion of our history, the era of the American Fur Trade. My interest in that period may be said to have begun at the age of six when, clinging to the forefinger of my father, I discovered the Missouri River from a bluff top at Kansas City. It was flood time, and the impression I received was deep and lasting. Even now I cannot think of that stream without a thrill of awe and something of the reverence one feels for mighty things. It was for me what the sea must have been to the Greek boys of antiquity. And as those ancient boys must have been eager to hear of perils nobly encountered on the deep and in the lands adjacent, so was I eager to learn of the heroes who had travelled my river as an imperial road. Nor was I disappointed in what I learned of them; for they seemed to me in every way equal to the heroes of old. I came to think of them with a sense of personal ownership, for any one of many of them might have been my grandfather-and so a little of their purple fell on me. As I grew older and came to possess more of my inheritance, I began to see that what had enthralled me was, in fact, of the stuff of sagas, viiia genuine epic cycle in the rough. Furthermore, I realized that this raw material had been undergoing a process of digestion in my consciousness, corresponding in a way to the process of infinite repetition and fond elaboration which, as certain scholars tell us, foreran the heroic narratives of old time. I decided that some day I would begin to tell these hero tales in verse; and in 1908, as a preparation for what I had in mind, I descended the Missouri in an open boat, and also ascended the Yellowstone for a considerable distance."