Francis Parkman 
France and England in North America; a Series of Historical Narratives — Part 3 [EPUB ebook] 

The discovery of the Great West, or the valleys of the Mississippi and the Lakes, is a portion of our history hitherto very obscure. Those magnificent regions were revealed to the world through a series of daring enterprises, of which the motives and even the incidents have been but partially and superficially known. The chief actor in them wrote much, but printed nothing; and the published writings of his associates stand wofully in need of interpretation from the unpublished documents which exist, but which have not heretofore been used as material for history.