San Francisco Mining Company and California Cygnet Company (1863-1902) list of shareholders and legal papers; Investigative files: Robert W. Souter (1973-1876), Charles G. Mugg (1874-1878, Joseph Wrigley (1858-1872), Piper-Baldwin (1863-1900), Fair-Craven Case (1890s); photographs; notes; correspondence; resolution book