The collection contains three prospecting log books pertaining to land in Shasta and Trinity counties. Shasta County tracts include the Elmore Tract, Lone Hill Tract, Elmore Tract 1-167, Lone Hill Tract 182, McCormick Saeltzer Tract. The Trinity County tracts include Webster Treat Tract, John Larsen Tract, Sypes Placer Mining Co. Tract, Wm. Vollmers Tract.

Descriptions and drawings of the land are at 5 five feet increments, with the size of shaft, weight of gold, value per cubic yard, and cubic feet in test. Notes in Books #3 and #12 indicate value of gold (1 grain) at 3.9 cents; grains in 1 milligram .01543, and value 1 milligram of gold .0060177 cents.