Prairie Pipe Line Company - applications for reports; Sinclair Prairie Oil Company of Louisiana; Exchange Oil Company; Sinclair Prairie Oil Company - lease, oil royalty inquiry, title opinions, contracts, acquisitions; Sinclair Oil Corporation tax memoranda and briefs; Sinclair Wyoming Oil Company; Prairie Oil and Gas Company stock, correspondence, agreements, legal cases; Petroleum Corp. of America, 1918 - 1948

Prairie Pipe Line Company - applications for employment and medical examiner's reports (1926); Sinclair Prairie Oil Company of Louisiana - corporate file including minutes of meetings, general correspondence, etc. (1918-1941), corporate file including charter and bylaws (1919-1940); Exchange Oil Company - corporate file including authority to transact business in Montana, and dissolution proceedings (1927-1946); Sinclair Prairie Oil Company - lease between above named company and Mrs. Marean Beatrice Orr covering certain oil rights to property located in Gaines County, Texas (1944), inquiry by the attorney general of the State of New York concerning oil royalty payments made by the above company to Mart B. Shepard of Buffalo, New York (1933), title opinions (Texas) (1939), contract between Thomas B. Slick, as seller, and the Prairie Oil & Gas Company as purchaser, covering oil and gas properties in Kansas, Oklahoma, Texas, and Louisiana, and assignment by purchaser to Sinclair Priarie Oil Company (1930); Sinclair Oil Corporation - tax memoranda and briefs concerning properties and assets of the Prairie Oil & Gas Company and The Prairie Pipe Line Company (1938-1939); Sinclair Prairie Oil Company - acquisition of Sinclair Wyoming Oil Company, Repollo Oil Company, Sinclair Prairie Oil Company of Louisiana, and Exchange Oil Company (1938-1940); Township of Egg Harbor, New Jersey vs Sinclair Wyoming Oil Company et al. (tax title action) (1945-1946); Sinclair Wyoming Oil Company - corporate file including charter and bylaws, etc., and consolidation and merger with Prairie Oil Company and Repollo Oil Company (1919-1948); Prairie Oil and Gas Company stock (1928); Prairie Oil and Gas - correspondence (1928-1929), common stock (1930), Sinclair Consolidated Oil Co. stock (1928), Blair & Co. Inc. purchase agreement (1928), share agreement (1928), syndicate agreement (1928-1930), Bogosian vs. Gulf Oil Corp. (1928), Bogosian vs. Gulf Oil Corp. memorandum of agreement (1928-1933), Prairie Pipe Line Company syndicate agreement "B" (1928-1929); Petroleum Corp. of America - purchase group (1929), Petroleum Corp. of America banking (1929), banking and purchase group (1929)