On this day in Lewis & Clark history...
At Camp White Fish, Lewis completes his astronomical observations, the boats are loaded, and the Expedition sets out at midday. At their evening camp north of present Omaha, Nebraska, they are tormented by mosquitoes.
From the journals...
White Cat fish Camp 10 ms above Platt
27th of July Friday
Camped in a Bend to the L. Side in a Coops of Trees, a verry agreeable Breeze from the N W. this evening. I Killed a Deer in the Prarie and found the Misquitors So thik & troublesom that it was disagreeable and painfull to Continue a moment Still.
Mosquito, Culex quinquefasciatus
Photo created by the U.S. Center for Disease Control.