. Sixth annual report of the United States geological survey of the Territories, embracing portions of Montana, Idaho, Wyoming, and Utah : being a report of progress of the explorations for the year 1872. Flake of black flint,natural size. Foundwith tlie preceding. Flake of browuish-black flint, natu-ral size. Found with the preced- Fiii. Li Fiff.

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