The surface of the country between the Osage towns and the Pawnee village is generally broken and naked; the soil sterile, and abounding with flint and lime stones. As you approach the waters of the Kanses, it becomes hilly and sandy. The same may be said of the country between the Pawnee village and the Arkansaw; but after passing the ridge which separates the waters of the Kanses and Arkansaw, the surface becomes more regular and less stony.
Below the Verdigrise the shores of the Arkansaw are generally lined with cane [Arundinaria macrosperma], and consequently rich bottoms. I was informed by the Indians that the country to the northwest of the Osage village abounds with valuable lead mines, but I could make no discovery of any body of mineral.
The survey from the Arkansaw post to the Mississippi I fear is not correct, as I was so ill when I descended that part of the river as to be confined to my blanket.
The chart which accompanies this report, of the course of the Arkansaw, I hope will prove satisfactory, not only to yourself, but the president.
I have the honor to subscribe myself,
Your faithful and obliged,
Humble and obedient servant,
[Signed] James B. Wilkinson,
1st Lieut. 2d U. S. Regt. of Infantry.
His Excellency
General James Wilkinson,
Commander-in-Chief of the U. S. Army.