Preface to the 2006 ed. by Graham R. Ross; Introduction to the 1957 ed. by W. Kaye Lamb; Preface to the 1820 ed. by Daniel Haskel.
Originally published as: A journal of voyages and travel in the interior of North America between the 47th and 58th degrees of north latitude ..., Andover : Flagg & Gould, 1820.