This event led to a material change in the plan of the work, and it was decided to make it, not merely a narrative of personal experiences, but a history of steamboat navigation on the Missouri River. Very few people now have any conception of the part which this remarkable business played in the upbuilding of the West. There is no railroad system in the United States to-day whose importance to its tributary country is relatively greater than was that of the Missouri River to the trans-Mississippi territory in the first seventy-five years of the nineteenth century. The business of the fur trade, the intercourse of government agents with the Indians, the campaigns of the army throughout the valley, and the wild rush of gold-seekers to the mountains, all depended, in greater or less degree, upon the Missouri River as a line of transportation. [Sidenote: AN IMPORTANT BUSINESS.] It is not alone from a commercial point of view that the record of this business is an important one. From beginning to end it abounds in thrilling incident, and the life which it fostered was full of picturesque and even tragic details. The circumstances surrounding a voyage up or down the Missouri, whether by canoe, mackinaw, keelboat, or steamboat, were quite out of the line of ordinary experience. No other river in this country has a record to compare with it. Captain La Barge’s life embraced the entire era of active boating business on the river. He saw it all--from the time when the Creole and Canadian voyageurs cordelled their keelboats up the refractory stream to the time when the railroad won its final victory over the steamboat. He was on the first boat that went to the far upper river, and he made the last through voyage from St. Louis to Fort Benton. He typified in his own career the meteoric rise and fall of that peculiar business. He grew up with it, prospered with it, and was ruined with and by it. He saw and shared the wonderful metamorphosis that came over the Missouri Valley in the space of fourscore years, and his reminiscences are a succession of living pictures taken all along the line. [Sidenote: HISTORICAL METHOD ADOPTED.] It is hoped that the method adopted, of weaving the story which it is here attempted to relate around the biography of its most distinguished personality, will not detract from its value as historical material. It is not the bare narration of events that gives history its true value, but those intimate pictures of human life in other times that show what people really did and the motives by which they were actuated. To this end, biography, and even fiction, possess distinct advantages over the ordinary method of historical writing. [Sidenote: SOURCES OF INFORMATION.]