Evans's map and analysis, being the best extant, served as the basis of the published materials used for the topographical guidance of General Braddock on his march over the Alleghany mountains. Washington, himself an eminent geographer, was present in that memorable march; and so judicious and well selected were its movements, through defiles and over eminences, found to be, that the best results of engineering skill, when the commissioners came to lay out the great Cumberland road, could not mend them. Such continued also to be the basis of our general geographical knowledge of the West, at the period of the final capture of fort Du Quesne by General Forbes, and the change of its name in compliment to the eminent British statesman, Pitt.
The massacre of the British garrison of Michilimackinac in 1763, the investment of the fort of Detroit in the same year by a combined force of Indian tribes, and the development of an extensive conspiracy, as it has been termed, against the western British posts under Pontiac, constituted a new feature in American history; and the military expeditions of Cols. Bouquet and Bradstreet, towards the West and North-west, were the consequence. These movements became the means of a more perfect geographical knowledge respecting the West than had before prevailed. Hutchinson's astronomical observations, which were made under the auspices of Bouquet, fixed accurately many important points in the Mississippi valley, and furnished a framework for the military narrative of the expedition. In fact, the triumphant march of Bouquet into the very strongholds of the Indians west of the Ohio, first brought them effectually to terms; and this expedition had the effect to open the region to private enterprise.
The defeat of the Indians by Major Gladwyn at Detroit had tended to the same end; and the more formal march of Colonel Bradstreet, in 1764, still further contributed to show the aborigines the impossibility of their recovering the rule in the West. Both these expeditions, at distant points, had a very decided tendency to enlarge the boundaries of geographical discovery in the West, and to stimulate commercial enterprise.
The Indian trade had been carried to fort Pitt the very year of its capture by the English forces; and it may serve to give an idea of the commercial daring and enterprise of the colonists to add, that, so early as 1766, only two years after Bouquet's expedition, the leading house of Baynton, Wharton & Morgan, of Philadelphia, had carried that branch of trade through the immense lines of forest and river wilderness to fort Chartres, the military capital of the Illinois, on the Mississippi.3 Its fertile lands were even then an object of scarcely less avidity.4 Mr. Alexander Henry had, even a year or two earlier, carried this trade to Michilimackinac; and the English flag, the symbol of authority with the tribes, soon began to succeed that of France, far and wide. The Indians, finding the French flag had really been struck finally, submitted, and the trade soon fell, in every quarter, into English hands.
The American revolution, beginning within ten years of this time, was chiefly confined to the regions east of the Alleghanies. The war for territory west of this line was principally carried on by Virginia, whose royal governors had more than once marched to maintain her chartered rights on the Ohio. Her blood had often freely flowed on this border, and, while the great and vital contest still raged in the Atlantic colonies, she ceased not with a high hand to defend it, attacked as it was by the fiercest and most deadly onsets of the Indians.
In 1780, General George Rogers Clark, the commander of the Virginia forces, visited the vicinity of the mouth of the Ohio, by order of the governor of Virginia, for the purpose of selecting the site for a fort, which resulted in the erection of fort Jefferson, some few miles (I think) below the influx of the Ohio, on the eastern bank of the Mississippi. The United States were then in the fifth year of the war of independence. All its energies were taxed to the utmost extent in this contest; and not the least of its cares arose from the Indian tribes who hovered with deadly hostility on its western borders. It fell to the lot of Clark, who was a man of the greatest energy of character, chivalric courage, and sound judgment, to capture the posts of Kaskaskia and Vincennes, in the Illinois, with inadequate forces at his command, and through a series of almost superhuman toils. And we are indebted to these conquests for the enlarged western boundary inserted in the definitive treaty of peace, signed at Paris in 1783. Dr. Franklin, who was the ablest geographer among the commissioners, made a triumphant use of these conquests; and we are thus indebted to George Rogers Clark for the acquisition of the Mississippi valley.
American enterprise in exploring the country may be said to date from the time of the building of fort Jefferson; but it was not till the close of the revolutionary war, in 1783, that the West became the favorite theatre of action of a class of bold, energetic, and patriotic men, whose biographies would form a very interesting addition to our literature. It is to be hoped that such a work may be undertaken and completed before the materials for it, are beyond our reach. How numerous this class of men were, and how quickly they were followed by a hardy and enterprising population, who pressed westward from the Atlantic borders, may be inferred from the fact that the first State formed west of the Ohio river, required but twenty years from the treaty of peace for its complete organization. Local histories and cyclical memoirs have been published in some parts of the West, which, though scarcely known beyond the precincts of their origin, possess their chief value as affording a species of historical material for this investigation. Pioneer life in the West must, indeed, hereafter constitute a prolific source of American reminiscence; but it may be doubted whether any comprehensive work on the subject will be effectively undertaken, while any of this noble band of public benefactors are yet on the stage of life.
The acquisition of Louisiana, in 1803, became the period from which may be dated the first efforts of the United States' government to explore the public domain. The great extent of the territory purchased from France, stretching west to the Pacific ocean—its unknown boundaries on the south, west, and north—and the importance and variety of its reputed resources, furnished the subjects which led the Executive, Mr. Jefferson, to direct its early exploration. The expeditions named of Lewis and Clark to Oregon, and of Pike to the sources of the Mississippi, were the consequence. Pike did not publish the results of his search till 1810. Owing to the death of Governor Meriwether Lewis, a still greater delay attended the publication of the details of the former expedition, which did not appear till 1814. No books had been before published, which diffused so much local geographical knowledge. The United States were then engaged in the second war with Great Britain, during which the hostility of the western tribes precluded explorations, except such as could be made under arms. The treaty of Ghent brought the belligerent parties to terms; but the intelligence did not reach the country in season to prevent the battle of New Orleans, which occurred in January 1815.
Letters from correspondents in the West, which were often published by the diurnal press, and the lectures of Mr. W. Darby on western and general geography, together with verbal accounts and local publications, now poured a flood of information respecting the fertility and resources of that region, and produced an extensive current of emigration. Thousands were congregated at single points, waiting to embark on its waters. The successful termination of the war had taken away all fear of Indian hostility. The tribes had suffered a total defeat at all points, their great leader Tecumseh had fallen, and there was no longer a basis for any new combinations to oppose the advances of civilization. Military posts were erected to cover the vast line of frontiers on the west and north, and thus fully to occupy the lines originally secured by the treaty of 1783. In 1816, Mr. J. J. Astor, having purchased the North-west Company's posts, lying south of latitude 49°, established the central point of his trade at Michilimackinac. A military post was erected by the government at the falls of St. Anthony, and another at Council Bluffs on the Missouri. The knowledge of the geography and resources of the western country was thus practically extended, although no publication, so far as I am aware, was made on this subject.
In the fall of 1816, I determined to visit the Mississippi valley—a resolution which brought me into the situations narrated in the succeeding volume. In the three ensuing years I visited a large part of the West, and explored a considerable portion of Missouri