Prologue to Lewis and Clark: the Mackay and Evans expedition

Before Mackay and Evans: "la rivie`re Pekittanoui?"

The third Spanish expedition takes form: "marching with long strides upon unknown soil"

From St. Louis to Fort Charles: "an expensive enterprise"

The Missouri River Basin explored: "those remarkable things mentioned by Evens"

De?nouement and disillusion: "the two most famous travelers of the northern countries of this continent"

Selected documents, 1795-1822

Appendix: Concordance of physical features on the Beinecke Library and the Indian Office maps.