If De Soto began it (and of this there seems little question, for Narvaez perished before reaching it), and Marquette and Joliet continued it; if Hennepin and Pike and Cass carried these explorations higher, I, at least, went to its remoter points, and thence traced the river to its primary forksascended the one, crossed the heights of Itasca to the other, and descended the latter in its whole length.