Lot of 6. The Densmore Mine contains 59 acres extending southeastward from Stanislaus River up the steep east slope of the canyon to the Columbia and Parrotts Ferry road 2 miles from Columbia. The gold is principally associated with pyrite, marcasite, galena, and other sulfides. The first reported production was in 1899-1900 by William Francis, who shipped rich sulfide ore that yielded $26,000. Hayward and Lane and Densmore Consolidated Mining Company worked the mine from 1900 to 1906, and used a 14-stamp mill, concentrators, and cyanide plant to treat ore from a shoot about 200 feet long and 400 feet deep, which was found in No. 3 adit, connecting with a shaft 500 feet deep. About 19,000 tons was produced during this period. From then until _x005F 1936, the workings were extended but little ore was milled. 1) 1901 letterhead for ores worked January 1901. 2-3) Two Reduction Works Reports, March and April 1901. Lists results for Ore, Sulphurets, and Tailings. 4-5) Two Memorandums of Gold Bullion, 1902 and 1903. Results range in gold fineness from 344-740. 6) 1901 Assay Report for Mill Sulphurets and Tailings. Columbia California 1901-1903