July 21st Satturday, Set out verry early and a Gentle Breeze from the S. E proceeded on very well, passed a (1) Willow Island L. S. opsd. a bad Sand bar passed Some high land covered with Timber, in this Hill is Semented rock & Limestone the water runs out and forms Several little Islands in (2) high water on the S. S. a large Sand bar on the S. S. above and opposit the wooded High Land, at about 7 oClock the wind Seased and it Commenced raining passed many Sand bars opposit or in the Mouth of the Great River Plate this river which is much more rapid than the Missourie has thrown out imence quantities of Sand forming large Sand Banks at its mouth and forced the Missourie Close under the S. S. the Sands of this river Comes roleing down with the Current which is Crowded with Sand bars and not 5 feet water at any place across its mouth, the Rapidity of the Current of this river which is greater than that of the Missourie, its width at the Mouth across the bars is about 3/4 of a mile, higher up I am told by one of the bowmen that he was 2 winters on this river above and that it does not rise 7 feet, but Spreds over 3 miles at Some places, Capt Lewis & my Self went up Some Distance & Crossed found it Shallow. This river does not rise over 6 or 7 feet
Proceeded on passed the mouth of Papillion or Butter fly Creek 3 miles on the L. S. a large Sand bar opposit on that Side Camped above this baron L. S. a great number of wolves about us all night R. Fields killed a Deer hard wind N. W. cold
[Clark, July 21, 1804]
July 21st, Satturday 1804 Set out early under a gentle breeze from the S. E. proceeded on verry well, passed (1) a willow Island on the L. S. opposit a bad Sand bar, Some high lands covered with timber L. S in this hill is limestone & Seminted rock of Shels &c. (2) in high water the opposit Side is cut thro by Several Small Channels, forming Small Islands, a large Sand bar opposit the Hill at 7 oClock the wind luled and it Commnc'd raining, arrived at the lower Mouth of the Great River Platt at 10 oClock (about 3 ms. above the Hill of wood land, the Same range of High land Continus within 3/4 of a mile of the mouth below) This Great river being much more rapid than the Missourie forces its current against the opposit Shore, The Current of This river Comes with great Velocity roleing its Sands into the Missouri, filling up its Bend & Compelling it to incroach on the S Shore—we found great dificuelty in passing around the Sand at the mouth of this River Capt Lewis and My Self with 6 men in a perogue went up this Great river Plate about 1 miles, found the Current verry rapid roleing over Sands, passing through different Channels none of them more than five or Six feet deep, about 600 yards Wide at the mouth—I am told by one of our Party who wintered two winters on This river that "it is much wider above, and does not rise more than five or Six feet" Spreds verry and from its rapidity & roleing Sands Cannot be navagated with Boats or Perogues—The Indians pass this river in Skin Boats which is flat and will not turn over. The Otteaus a Small nation reside on the South Side 10 Leagues up, the Panies on the Same Side 5 Leagus higher up—about 10 Leagus up this river on the S. Side a Small river Comes into the Platt Called Salt River, "The waters So brackish that it Can't be Drank at Some Seasons" above this river & on the North Side a Small river falls into the Platt Called Elk River This river runs Parralal withe the Missouri—at 3 miles passed a Small river on the L. S. Called Papillion or Butterfly C. 18 yds. wide a large Sand bar off the mouth, we proceeded on to get to a good place to Camp and Delay a fiew days, passed around this Sand bar and Came to for the night on the L. S. a verry hard wind from the N. W. I went on Shore S. S. and proceeded up one mile thro high Bottom land open a Great number of wolves about us this evening
[Clark, July 22, 1804]
July 22nd Sunday Set out verry early with a view of getting Some timbered land & a good Situation to take equil altitudes in time proceeded on nearly a North 15° W 7 ms. to a pt. S. S. opposit Some high Lands on L. S. above the upper point of a long willow Island in the middle of the river 6 Deer killed to Day we deturmined to Stay here 4 or 5 days to take & make obsvts. & refresh our men also to Send Despatches back to govement—Wind hard N. W. Cold