Series of two drawings - Wooden bridge to be built on principle of Long's frame bridge - India - surveyed by Robert Stevenson., 1839., MS.5873 (1)-(2). Plans chiefly made by Messrs Stevenson, the Edinburgh civil engineers., MSS.5843-5896. National Library of Scotland Archives and Manuscripts Division. https://manuscripts.nls.uk/repositories/2/archival_objects/59691 Accessed May 11, 2024.