Consists of reports, data, and other material produced by Delaware Electric Power Co. for the Securities and Exchange Commission. Included in this series are annual financial reports (10-K forms) from Delaware Electric Power and cost estimates of operating companies separated by the Public Utility Holding Company Act of 1935. Most notable are documents regarding the surrender of stock by the United Gas Improvement Company to Delaware Electric Power by act of legislation, and the eventual separation of the latter company's utilities from its transit operations in 1941-1942. Accordingly, Russel S. Stoughton's purchase of Delaware Coach Co. in 1950-1951 is also represented.