| I. | The Old Vincennes Trace near Xenia, Illinois | [Frontispiece] |
| II. | Sketch Map of Part of Illinois, Showing Clark’s Routes | [21] |
| III. | Hutchins’s Sketch of the Wabash in 1768 (showing trace of the path to Kaskaskia; from the original in the British Museum) | [35] |
| IV. | The St. Louis Trace near Lawrenceville, Illinois | [62] |
| V. | A Part of Arrowsmith’s Map of the United States, 1796 (showing the region in which Wilkinson, Scott, Harmar, St. Clair, and Wayne operated) | [117] |
| VI. | Dr. Belknap’s Map of Wayne’s Route in the Maumee Valley, 1794 (from the original in the Library of Harvard University) | [197] |