Cobbs Creek Baltimore and Ohio Railroad Company. Philadelphia Division. Railroad bridges -- Pennsylvania -- Darby. Truss bridges -- Pennsylvania -- Darby. Depicts a through truss bridge spanning Cobbs Creek. March 1891. Cyanotypes 1890-1900 digitool:36721 Library Company of Philadelphia Print Dept. albums - B&O [P.9945.111] P.9945.111 Part of B & O Railroad Album Part of B & O Railroad Album: "Bridges and buildings, Philadelphia Division, Baltimore & Ohio Railroad, 1891." Darby (Pa.)