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Lewis, July 16, 1804

Monday 16th we set out at an early hour; the morning was cloudy; could find no convenient situation for observation; proceeded untill a little before noon when we came too On the Lard. Shore opposite to the center of good Island where I observed the meridian altitude of O's L. L. with Octant by the back observation, wich gave me the Latitude- 40° 20' 12" N.

I now set the Chronometer as near noon as this observation would enable me, and proceeded untill evening, when we came too on the Stard. shore opposite the lower point of the Island of the Bald prarie where we encamped.