The Wheeling Intelligencer.
"Captain Glazier's name is familiar to the reading public of America through his earlier works, 'Soldiers of the Saddle,' 'Capture, Prison-Pen and Escape,' 'Battles for the Union,' 'Heroes of Three Wars,' 'Peculiarities of American Cities,' and 'Ocean to Ocean on Horseback.' His latest book, 'Down the Great River,' is his most important essay in the field of literature, and is in several respects unique. It is a very interesting account of a remarkable canoe voyage from the head waters of the Mississippi to the Gulf; but its importance comes from the fact that, until this voyage was made, the source of the Mississippi was universally placed in Lake Itasca, whereas Glazier and his party demonstrated that a higher basin, now put down in all the new maps and geographies as Lake Glazier, is really the primary reservoir of the Mississippi. It seems almost incredible, but is nevertheless true, that for over forty years previous to 1881, when Captain Glazier made his discovery, it was accepted as settled that Lake Itasca was the remotest body of water from the mouth of the Mississippi. The falsity of this theory, however, has been established and an important discovery given to the geographical world. No discovery rivaling this in interest and importance has been made on the American continent for half a century."
Philadelphia Public Ledger.
"By the discoveries of Captain Willard Glazier, made in 1881, Lake Itasca is dislodged from its former eminence as the source of the Mississippi, the real head-waters of that mighty stream being traced to Lake Glazier, a distance of 3,184 miles from the Gulf of Mexico."
Brooklyn Eagle.
"Captain Glazier's very clear map of the Great River shows the True Source to be south of Lake Itasca, accepted by Schoolcraft in 1832 as the head-waters in disregard of the stream entering its southwestern arm.... To Captain Glazier belongs the identification of the fountain-head of the Mississippi."