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.
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