PREFACE
The compiler of a series of sketches of American Explorers and Travellers experiences at the very outset a serious embarrassment from the superabundant wealth of original material at his command. The history of America for two hundred years after the voyage of Joliet has been the history of courageous, persistent, and successful exploration, wherein the track of the explorer, instantly serving as a trail for the pioneer, has speedily broadened into the wagon-road of invading immigrants.
Explorations and journeys of such an extent as in other and older lands would have excited praise and merited reward have been so frequent in this continent as to pass almost unnoticed. Hence the scope of this modest volume is necessarily confined to explorations of great importance or peculiar interest, and when made by men of American birth who are no longer living.
In deference to the author's advisers, two exceptions have been made—Du Chaillu and Stanley, Americans by adoption—otherwise African exploration, so wondrously successful in this generation and so fruitful in its results, would have been unrepresented. Again, the unparal-
