Statistics for occurrence #1 of “Capt. E. L. Bonneville” in entry united-states-of-america-wyoming of Harper's Encyclopedia of United States History:

...ig Horn Mountains to the Wind River, thence to the Snake River......1811 William H. Ashley, of the North American Fur Company, with 300 men, explores the Sweetwater and Green rivers......1824 Capt. E. L. Bonneville leads the first caravan, 110 trappers and twenty wagons, from the Platte through South Pass to the Green River. At the junction of Lead Creek he builds a fort......1832 William Sublette and Ro...
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