Abstract This collection contains the papers of Frederick Oskar Martin, a German who moved to the United States in 1891 and worked as a mining engineer and geologist for a variety of employers over the course of his career. He spent a year working on the Panama Canal and explored the holdings of Union Oil of California in Panama and Colombia in the 1920s. His papers include mining reports, correspondence with his fiancé and brother in the late 1890s, and scrapbooks of his travels in South and...