Statistics for occurrence #1 of “Calvin C. Chaffee” in entry united-states-of-america-missouri of Harper's Encyclopedia of United States History:

........April 14, 1855 Gov. Trusten Polk resigns to become United States Senator......March, 1857 Dred Scott and family emancipated by Taylor Blow, under deed for that purpose from the family of Calvin C. Chaffee , who inherited then......May 26, 1857 First overland mail leaves St. Louis for San Francisco......Sept. 16, 1858 First overland mail from California arrives at St. Louis twenty-four days eigh...
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