This collection contains general correspondence (1882-1951), including letters on banking reform, the Montana Waterways Association, and other topics; court papers (1902-1937, undated) including files on several court cases and indexes to court cases; a legal document (1918) admitting Scallon to practice before the U.S. Land Office; a book (undated) of maps and photographs of Anaconda mines; printed material (1902-1960) collected by Scallon on a wide variety of topics; reports (1914-1916) to the Montana Bar Association; speeches and writings (mostly undated) on a wide variety of topics; and miscellany. There is also a subgroup for United States vs. Standard Oil Company in which Scallon served as counsel for the United States government in a suit to regain title to lands within the Naval Oil Reserve in California. The subgroup includes general correspondence (1929-1935), court papers (1925-1938), financial records (1929-1930), maps (1932, undated), and miscellany, including a list of records of the case. This collection consists primarily of Scallon's legal case files as special counsel for the United States in a suit against Standard Oil Company (1929-1935) to regain title to lands in California's Naval Oil Reserve. There is also a small subgroup of Scallon's personal correspondence (typed copies) concerning Irish independence, the Sino-Japanese War, and other interests. The collection contains no material on the Anaconda Company.