This subseries contains documents relating to William M. Darlington's properties, investments, taxes and profession. Property records include a title to land in Allegheny County, an auction catalog of household goods inscribed to William, and a small notebook dated 1879 that lists bonds and mortgage payments. Additionally, two bound volumes, an account book and a book of financial records, document rent and mortgage payments, including payments from such institutions as the trustees of Jefferson College, and Snyder & Company. William owned stock in the Pittsburgh Manufacturing Company, the Sharpsburg Bridge Company, the Mercantile Library Hall Company, and paid taxes in Allegheny County and O'Hara Township. Also present are documents certifying William to practice law in Allegheny County and the state of Alabama.