Mr. Schoolcraft's marriage into an aboriginal family gave no small stimulus to these inquiries, which were pursued under such singularly excellent advantages, and with untiring ardor in the seclusion of Elmwood and Michilimackinack, for a period of nearly twenty years, and, until his wife's lamented death, which happened during a visit to her sister, at Dundas, Canada West, in the year 1842, and while he himself was absent on a visit to England. Mr. Schoolcraft has not, at any period of his life, sought advancement in political life, but executed with energy and interest various civic offices, which were freely offered to him. From 1828 to 1832, he was an efficient member of the Territorial Legislature, where he introduced a system of township and county names, formed on the basis of the aboriginal vocabulary, and also procured the incorporation of a historical society, and, besides managing the finances, as chairman of an appropriate committee, he introduced and secured the passage of several laws respecting the treatment of the native tribes.
In 1828, the Navy Department offered him a prominent situation in the scientific corps of the United States Exploring Expedition to the South Seas. This was urged in several letters written to him at St. Mary's, by Mr. Reynolds, with the approbation of Mr. Southard, then Secretary of the Navy. However flattering such an offer was to his ambition, his domestic relations did not permit his acceptance of the place. He appeared to occupy his advanced position on the frontier solely to further the interests of natural history, American geography, and growing questions of philosophic moment.
These particulars will enable the reader to appreciate the advantages with which he commenced and pursued the study of the Indian languages, and American ethnology. He made a complete lexicon of the Algonquin language, and reduced its grammar to a philosophical system. "It is really surprising," says Gen. Cass, in a letter, in 1824, in view of these researches, "that so little valuable information has been given to the world on these subjects."
Mr. Duponceau, President of the American Philosophical Society, translated two of Mr. Schoolcraft's lectures before the Algic Society, on the grammatical structure of the Indian language, into French, for the National Institute of France, where the prize for the best essay on Algonquin language was awarded to him. He writes to Dr. James, in 1834, in reference to these lectures: "His description of the composition of words in the Chippewa language, is the most elegant I have yet seen. He is an able and most perspicuous writer, and treats his subject philosophically."
Approbation from these high sources had only the effect to lead him to renewed diligence and deeper exertions to further the interests of natural science, geography, and ethnology; and, while engaged in the active duties of an important government office, he maintained an extensive correspondence with men of science, learning, and enterprise throughout the Union.
The American Philosophical, Geological, and Antiquarian Societies, with numerous state and local institutions, admitted him to membership. The Royal Geographical Society of London, the Royal Society of Northern Antiquaries at Copenhagen, and the Ethnological Society of Paris, inscribed his name among their foreign members. In 1846, the College of Geneva conferred on him the degree of LL.D.
While the interests of learning and science thus occupied his private hours, the state of Indian affairs on the western frontiers called for continued exertions, and journeys, and expeditions through remote regions. The introduction of a fast accumulating population into the Mississippi Valley, and the great lake basins, continually subjected the Indian tribes to causes of uneasiness, and to a species of reflection, of which they had had no examples in the long centuries of their hunter state.
In 1825, 1826, and 1827, he attended convocations of the tribes at very remote points, which imposed the necessity of passing through forests, wildernesses, and wild portages, where none but the healthy, the robust, the fearless, and the enterprising can go.
In 1831, circumstances inclined the tribes on the Upper Mississippi to hostilities and extensive combinations. He was directed by the Government to conduct an expedition through the country lying south and west of Lake Superior, reaching from its banks, which have from the earliest dates been the fastnesses of numerous warlike tribes. This he accomplished satisfactorily, visiting the leading chiefs, and counseling them to the policy of peace.
In 1832, the Sauks and Foxes resolved to re-occupy lands which they had previously relinquished in the Rock River Valley. This brought them into collision with the citizens and militia of Illinois. The result was a general conflict, which, from its prominent Indian leader, has been called the Black Hawk war. From accounts of the previous year, its combinations embraced nine of the leading tribes. It was uncertain how far they extended. Mr. Schoolcraft was selected by the Indian and War Department, to conduct a second expedition into the region embracing the entire Upper Mississippi, north and west of St. Anthony's Falls. He pursued this stream to the points to which it had been explored in 1806, by Lieut. Pike, and in 1820, by Gen. Cass; and finding the state of the water favorable for ascending, traced the river up to its ultimate forks, and to its actual source in Itasca Lake. This point he reached on the 23d July, 1832; but a fraction under 300 years after the discovery of its lower portions by De Soto. This was Mr. Schoolcraft's crowning geographical discovery, of which he published an account, with maps, in 1833. He is believed to be the only man in America who has seen the Mississippi from its source in Itasca Lake to its mouth in the Gulf of Mexico.