Archival objects in this container: Tonopah-Rand Mining Company field survey notebook (no. 13) by L. B. Spencer & Company, 1901 Wonder Mining District field survey notebook (no. 19) by L. B. Spencer & Company, 1907 Goldfield field survey notebook (no. 18) by L. B. Spencer & Company, 1907 Butler Mining Company (Tonopah) field survey notebook (no. 21) by L. B. Spencer & Company, 1908 Mina, Nevada field survey notebook (no. 33) by L. B. Spencer & Company, 1921 Mohawk Mine timebook by L. B. Spencer & Company, 1911 to 1913 Luckyboy Argentum Mining Co. field survey notebook (no. 72) by L. B. Spencer & Company, approximately 1920 to 1930 Eureka Crown Mining Co. field survey notebook by L. B. Spencer & Company, 1929 Dayton Con. Mines Co./Keystone Justice Mine field survey notebook (no. 12) by L. B. Spencer & Company, 1940 Simon Silver Lead Mines field survey notebook (no. 47) by L. B. Spencer & Company, 1939 L. B. Spencer & Company Civil and Mining Engineer, Mina, Nevada: patented claims, composite maps, vertical projections, and report on Simon Silver-Lead Mine, Simon, Nevada, approximately 1919 to 1930