1856. Chapman, Silas and Ferd. Mayer & Co. Cartographic Details: Scale [1:633,600] Shows county boundaries as of 1855. Hand colored. 73 x 57 centimeters 1:633,600 General Minnesota Maps. Silas Chapman;  Milwaukee, Wisconsin 1856.
    
  
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      1857. A.S. Barnes & Co., Chapman, Silas, Ferd. Mayer & Co., and J.B. Lippincott Company. Cartographic Details: Scale approximately 1:630,000. Shows county boundaries as of 1856-1857. Entered by Silas Chapman. Hand colored. 73 x 57 centi... Dyer & Pasmore;  Milwaukee, Wisconsin 1857.
    
  
    
      1868. Chapman, Silas and Lipman, Louis. Cartographic Details: Scale approximately 1:630,000. Cover title: Chapman's sectional map of Minnesota. Shows county boundaries as of 1867. Publish... Silas Chapman;  Milwaukee, Wisconsin 1865.
    
  
    
      1869. Chapman, Silas. Shows county boundaries as of 1869.; Hand colored. 78 x 70 centimeters, on sheet 82 x 76 centimeters Scale [ca. 1:630,000] General Minnesota Maps. Silas Chapman (Milwaukee,  Wis), 1865.