Arrangement
The records are arranged into ten series.
Series 1, Historical Background, 1827-1987
Series 2, Bridge Histories, 1867-1966
Series 3, President's Office, 1826-1880
Series 4, Correspondence, 1826-1859
Series 5, Business Records, 1894-1914, and undated
Series 6, Agreement, 1870
Series 7, Drawings, 1858-1957, and undated
Subseries 7.1, Indices and Lists, 1924-1943, undated
Subseries 7.2, Bailey's Station, 1887; 1899; 1901
Subseries 7.3, Baltimore Belt Railroad, 1895, undated
Subseries 7.4, Bay View and Canton Bridges, 1884-1885
Subseries 7.5, Big Seneca Creek Viaduct, 1905
Subseries 7.6, Bollman Bridges, undated
Subseries 7.7, Boyds, Maryland Station, 1886; 1927
Subseries 7.8, Bridewell Station, undated
Subseries 7.9, Bridges (general), 1893-1917
Subseries 7.10, Brunswick, Maryland, 1890-1907
Subseries 7.11, Building Materials List, undated
Subseries 7.12, Building Signs, 1911-1912
Subseries 7.13, Camden Station, 1881-1942 (not inclusive)
Subseries 7.14, Camden Station (related), 1881-1915
Subseries 7.15, Centenary Bridge Models, 1927
Subseries 7.16, Central Office Building, undated
Subseries 7.17, Chestnut Street Station, 1925-1952
Subseries 7.18, Coaling facilities, water tanks, turntables, and miscellaneous structures, 1888-1912
Subseries 7.19, Cumberland Station, 1910-1955
Subseries 7.20, Curtis Bay Branch, 1900-1911
Subseries 7.21, Frederick Station, 1908-1915
Subseries 7.22, Hyattsville Station, 1913
Subseries 7.23, Keedysville Station, undated
Subseries 7.24, Laurel Station, undated
Subseries 7.25, Ledger, undated
Subseries 7.26, Lieperville Station, 1889
Subseries 7.27, Locust Point, 1881-1957
Subseries 7.28, Maps, 1862; 1918
Subseries 7.29, Martinsburg, West Virginia, 1913-1927
Subseries 7.30, Miscellaneous Buildings, 1875-1956
Subseries 7.31, Miscellaneous Large Photographs, undated
Subseries 7.32, Miscellaneous Structures, 1890-1916
Subseries 7.33: Mt. Clare (general)
Subseries 7.34, Mt. Clare New Blue Line Stable, 1899; 1905
Subseries 7.35, Mt. Clare New Car Shops, undated
Subseries 7.36, Mt. Royal Station, undated
Subseries 7.37, Newton Falls and Fairpoint, Ohio, 1909
Subseries 7.38, Patapsco River Bridge, 1883
Subseries 7.39, Plans for house no. 1846 (N. Gay Street, Baltimore, Maryland), undated
Subseries 7.40, Point of Rocks Station, 1951
Subseries 7.41, Scales, 1903
Subseries 7.42, Signal towers, 1900-1908
Subseries 7.43, Stations (general), 1866-1907
Subseries 7.44, Sykesville Station, undated
Subseries 7.45, Untitled, undated
Subseries 7.46, Warnings, 1894-1911
Subseries 7.47, Woodstock Station, undated
Subseries 7.48, Miscellaneous (rolled), 1858-1930 (not inclusive)
Series 8, Photographs and Copy Prints, 1872-1980s (not inclusive)
Subseries 8.1, Photographs, 1872-1980s
Subseries 8.2, Copy prints, 1901-1931, undated
Subseries 8.3, Indices and Lists, 1909-1920
Series 9, Negatives, 1850-1983 (bulk 1920s-1930s)
Subseries 9.1, Glass plate negatives (unidentified), undated
Subseries 9.2, Glass plate negatives (numbered), 1850-1957 (bulk 1920s-1930s)
Subseries 9.3, Negatives by number, undated
Subseries 9.4, Negatives by location, 1870; 1978-1983
Subseries 9.5, Negatives by subject, 1922-1930s, undated
Series 10, Stations and Buildings, 1884-1982