Correspondence and geological reports about the Pine Valley, Nevada, region, particularly in regard to the possibilities of petroleum deposits. Reports done for Jack Taylor and Associates also include geological data on Elko, White Pine, northern Nye, and Lander counties.

Ruby Hill Development Company was a development and mining company in Eureka, Nevada. Included are engineers' reports for the Ruby Hill mining property two miles west of Eureka, Nevada, providing a history of the mine between 1919-1936, and maps and evaluation of future prospects; correspondence and notes about the Richmond-Eureka Mining Company and the U.S. Smelting and Refining Company.