Merchant and mayor. Correspondence (1892–1931) regarding the administration of the cities of Pierson, Iowa, and Marshall, Oklahoma; the business ventures in which Pearson was involved, including grain elevators and trade companies, coal bins, cattle herds, real estate, and ranches; and also regarding the Methodist Episcopal Church of Marshall, Oklahoma, the Masonic Order in Oklahoma, and the two hundredth anniversary celebrations of George Washington’s birth; minutes of meetings (1906–1912) of the Capital Grain and Elevator Company, Marshall, Oklahoma; certificates (1906–1946) of incorporation of the Capital Grain and Elevator Company, of membership in the Methodist Episcopal Church of Marshall, and others issued to Pearson by the Oklahoma State Council of Defense; legal papers (1896–1930) from the businesses with which Pearson was associated, including leases, bills of sale, insurance documents, and deeds; programs (1909–1937) from convocations, annual gatherings, and reunions of the Masonic Order in Oklahoma; and publications (1879–1948), including books, periodicals, catalogs, newsletters, government documents, pamphlets, and brochures, regarding agriculture, the stock exchange system, the George Washington Monument, the coal and grain industries, and the Masonic Order in the United States and Oklahoma. This collection also includes membership rosters (1895–1946) for lodges and divisions of the Masonic Order in Oklahoma and Iowa, as well as the constitution, governing codes, and bylaws of the Oklahoma lodges, and the Grand Master decisions for Oklahoma and Indian territories, and the state of Oklahoma.