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letterhead: Pen Sentinel Hotel, A. C. BLACK, Proprietor. Yo Semite Valley, July 15th 1872. Dear Mrs Carr, You announcing
Dr Gray is rec'd. I have great longing for Gray whom I feel to be a great progressive unlimited man like Darwin illegible
Tyndall. I will be most glad to meet him. You are unmeasuriable? in your kindness to me you hilm my fate more than all the
world beside. I am approaching a kind of f illegible ting time in this mountain work I want very much to see you. All say
underlined: write , but I don't know how or what, besides I want to see North South the midland basins the sea coast all the
lake basins the canons. Also the Alps of every country the continental glaciers of Greenland. before I write the book we have
been speaking of all this will require a dozen yrs or twenty, money the question is what will I write now etc. I have learned
the alphabet of ice mtn structure here I think I can read fast in other countries. I would let others write what I have read
here but that they