Note I-40 — Chapter I · ITINERARY: ST. LOUIS TO ST. PAUL, AUGUST 9TH-SEPTEMBER 21ST, 1805.

Probably 19 m., Cassville to Clayton, Ia., whence he could go comfortably for breakfast to Wyalusing, Wis., or still nearer the Wisconsin r. Above the mouth of Turkey r. the Miss. r. is divided into two courses, called the Casville slough on the Wisconsin side and the Guttenberg channel on the Iowan side. The latter is the broadest course, but the former is, or was some years ago, the main channel. The two come together 10 m. above Cassville, and a mile or two above Glen Haven, Wis. Guttenberg, Ia., is 8 m. above Cassville, at the mouth of Miners, Miner's, or Miners' cr.; it seems to have been formerly called Prairie La Port, as marked on Nicollet's map. Buck or Back cr. falls in a mile above. Approaching Clayton the banks are high and abrupt on the Iowan side, but on the other the hills recede, leaving a sloughy bottom into which several creeks empty, one of them Sandy cr., which comes by a sort of sand-bank. In this vicinity there was a place called Cincinnati, Wis., which seems to have disappeared, like another called Kilroy, on the Iowan side. Owen's map marks Killroy, a Clayton Co. map of 1857 has Keleroy, and Nicollet lays down the sizable creek near which it appears to have been situated, now known as the Sny Magill. The distance from Clayton to Wyalusing is 3 m.; thence it is about the same to the Wisconsin r.