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Clark, March 21, 1805

I return on the 21st and on my return I passed on the points of the high hills S. S. where I saw an emence quantity of Pumice Stone, and evident marks of the hills being on fire I collected some Pumice Stone, burnt Stone & hard earth and put them into a furnace, the hard earth melted and glazed the other two a part of which i, e, the Hard Clay became a Pumice-Stone, I also collected a Plant the root of which is a Cure for the Bite of a mad dog & Snake which I shall Send- Mr. Haney (I think it grows in the Blue R Barrens) the Indians make large Beeds of Different Colours-