Clark, May 20, 1805
May 20th Monday 1805
a fine morning wind from the N E. river falling a little We Set out at 7 oClock and proceeded on verry well as usial by the assistance of the Cord passed Some verry Swift water, river narrow and Crooked, at 11 oClock arrived at the mouth of Shell river on the Lard Side and formed a Camp for the present. haveing passed a large Creek about 4 miles below on the Ld Side which we call Blowing fly Creek from the emence quantites of those insects which geather on our meat in Such numbers that we are oblige to brush them off what we eate.
muscle Shell River falls in on Lard Side 2270 miles up Contains a greater perportion of water than Rivers of its Size below, I measured it and find it to be 110 yards wide, the water of a Greenish yellow Colour, and appers to be navagable for Small Craft, The Minetarras inform us that this river heads in the 1st of the rockey Mountains & passes through a broken Countrey. its head at no great distance from the Yellow Stone River The Countrey about this river as described yesterday we took the Meredian altitude 59° 50' 0" back observation and found the Latd. to be 47° 0' 24"
The Missouri at the mouth of Shell River is 222 yards wide with a Smoth Current the Missouri water is not So muddey as below, but retains nearly its usial Cholour, and the Sands principally Confined to the points I killed two Deer & an Elk, the hunters killed an Elk & Several deer mearly for their Skins to make Leagins,- Sent men out in every derection, the Countrey generally verry broken Some leavel plains up the Shell river The bottoms of the Shell river is well timbered as also a Small river which falls into that river on the upper Side 5 miles above its mouth. The hills on the Lard. Contain Scattering Pine & Cedar.