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.
In 1839, he published his collection of oral legends from the Indian wigwams, under the general cognomen of _Algic Researches_.