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  Silent Friend, Clear Creek County, Colorado 

  Contributor:Unknown
  Date:1916
• 

  Productive resources and purposes of the Ward Consolidated Mines Company of Boulder County, Colorado 

  Contributor:Ward Consolidated Mines Company
  Date:1928
• 

  Report on the Columbine and the German tunnel group situated on Bellevue Mountain 

  Contributor:Cooper, Geo. W.; Marks, John H. (John Henry)
  Date:1935
• 

  The Cache Creek placers 

  Contributor:Marks, John H. (John Henry)
  Date:1945
• 

  Report on Bluebird group of claims, Grand Island mining district, Boulder County, Colorado 

  Contributor:Deniston, Robert
  Date:1920-1929?
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  Report, Gem mines, Idaho Springs, Colorado : 1926 

  Contributor:Marks, John H. (John Henry)
  Date:1926
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  Siegfreid mining properties, Boulder County, Colorado 

  Contributor:Ayler, Maynard F.; Siegfreid, Jessie Z.
  Date:1957

  Report consists of two letters; one is dated "March 5, 1957" and the other, "March 20, 1957."
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  General Mining and Milling Corporation, Boulder County, Colorado 

  Contributor:Unknown
  Date:1925?
• 

  Statement of W.E. Renshaw : relating to the combination of the Gem Consolidated groups of properties located at and near Idaho Springs, Colorado 

  Contributor:Renshaw, W. E.
  Date:1935?
• 

  John H. Marks, drafts and reports 

  Contributor:Unknown
  Date:1925-1935

  Contains information about the Gem and Consolidated Seaton mountain groups of mining properties.
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  Copy of report of Mr. John H. Marks made on the Gem Consolidated Mines given to Mr. W. E. Renshaw : September 16, 1933 

  Contributor:Marks, John H. (John Henry)
  Date:1925-1935
• 

  Copy of report of Mr. John H. Marks made for the United Metals Syndicate, Dec. 1, 1930 

  Contributor:Marks, John H. (John Henry)
  Date:1930
• 

  Report on the Red Jacket, Patten and Patten extension, in Virginia Canon, near Idaho Springs, Colorado 

  Contributor:Weaver, T. A.
  Date:1918
• 

  Unknown mine, Clear Creek County, Colorado 

  Contributor:Unknown
  Date:1906

  Certificate of redemption to S.D.G. Walters.
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  P. R. Stanhope, Dumont, Clear Creek County, Colorado 

  Contributor:Unknown
  Date:1896-1939

  Includes a report (S & S Mining Company), a proposal, memos, agreements, certificates, an abstract of title, and a deed.
• 

  The Camp French Mining Company : incorporated under the laws of the state of Colorado 

  Contributor:Camp French Mining Company
  Date:1927?
• 

  Mattie Newton facts 

  Contributor:Little Mattie Mining, Milling & Power Co.
  Date:1900-1910?
• 

  The Freeland 

  Contributor:Roberts, John L.; Freeland Development and Transportation Company
  Date:1904
• 

  The Freeland 

  Contributor:United Freeland Development and Tunnel Company
  Date:1913
• 

  Notes on the prospective value of the property of the West Gold Company 

  Contributor:Bancroft, George J.
  Date:1900-1999?

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