Missouri River near Niobrara River — John Ordway: September 3, 1804

off at Sun rise, the wind blew from the west, passed yallow Bluff,
Some Stone under the bank near the water, passed round a large
sand point N. Side, the Timber Scarce on both Sides of the River.
N. B. a great many Beaver Sign & Cabbins on the river today.
We proceeded on a Swift current passed a white Chalk Bluff
close above we passed plumb Creek1 on N. S. which formed a
vallie between or in the bluff, we Camped on S. S. in a Grove of
cottonwood Timber.2