[Lewis] The rain which commenced last evening continued with little intermission untill 11 this morning when we set out; the high wind which accompanied the rain rendered it impracticable to procede earlyer. more rain has now fallen than we have experienced since the 15th of September last. many circumstances indicate our near approach to a country whos climate differs considerably from that in which we have been for many months. the air of the open country is asstonishingly dry as well as pure. I found by several experiments that a table spoon full of water exposed to the air in a saucer would avaporate in 36 hours when the murcury did not stand higher than the temperate point at the greatest heat of the day; my inkstand so frequently becoming dry put me on this experiment. I also observed the well seasoned case of my sextant shrunk considerably and the joints opened. . . . this day we proceded with more labour and difficulty than we have yet experienced; in addition to the imbarrasments of the rappid courant, riffles, & rockey point which were as bad if not worse than yesterday, the banks and sides of the bluff were more steep than usual and were now rendered so slippery by the late rain that the men could scarcely walk. the chord is our only dependance for the courant is too rappid to be resisted with the oar and the river too deep in most places for the pole. the earth and stone also falling from these immence high bluffs render it dangerous to pass under them. the wind was also hard and against us. our chords broke several times today but happily without injury to the vessels. we had slight showers of rain through the course of the day, the air was could and rendered more disagreeable by the rain.
Fun day, huh? They pass by an old encampment that is probably either Blackfoot or Atsina, but don't see recent signs of activity. The hunters killed two buffalo. With the late start and difficult going, they only made eight miles today.
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