Letter from George Sibley to James H. Birch, September 20, 1827 Sibley complains to the editor of the Western Monitor that he is not adequately providing all the information available. Letter is in the October 12, 1827 Missouri Intelligencer.
Sibley, George Champlin, "Letter from George Sibley to James H. Birch, September 20, 1827" (1827). George Champlin Sibley Papers. 277.
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