Papers mainly concerning the construction and administration of bridges, roads, piers, railways, harbours, reservoirs and canals in Scotland, 1782-1841, including correspondence of Henry Dundas, 1st Viscount Melville (1742-1811), Robert Saunders Dundas, 2nd Viscount Melville (1771-1851), and Sir Thomas Dundas, 1st Baron Dundas (1741-1820). The collection comprises letters, petitions, memorials, plans, estimates, reports, financial accounts, legal papers, trustees minutes and circulars relating to bridges including the Dee, Don, Urie, Findhorn, Montrose, Nairn, Pease, and Spey; canals including the Borrowstone Canal Navigation, the Clarence Canal, the Forth and Clyde Navigation, and the Union Canal (Falkirk to Edinburgh); ferries such as the Dysart Ferry, Queensferry, and Tay Ferries; harbours and piers notably Burntisland Harbour and Pier, Kinghorn Harbour, Hartlepool Pier, and Newhaven Pier; the Gala Water Railroad; the North Esk Reservoirs; roads in Aberdeen, Inverness, Dalkeith, Edinburgh, Glenlaidnaig, Glenlichorn, Lanarkshire, Lauriston, Perth, and Stirling.

Records relating to the management of bridges in London, 1664-1990, including petitions; reports; financial papers; legal papers; publications; press releases; papers relating to building and maintenance; title deeds relating to Staines Bridge and papers relating to proposals to build 'St Paul's Bridge', abandoned at the outbreak of World War One.

Also papers, 1868-1890, relating to the Select Committee of the House of Commons on Metropolitan Bridges which worked to free all bridges over the Thames and Lea from tolls, including papers on the Staines Bridge, Walton Bridge, Hampton Court Bridge, Kingston-on-Thames Bridge, Kew Bridge, Chingford Mills Bridge, Hellyer's Ferry Bridge and Tottenham Mills Bridge.

Bridge House Estates papers including bridgemasters' accounts rolls, 1381-1398; bridgemaster's annual accounts and rentals, 1404-1850; weekly payments, 1404-1445 and 1505-1849; bill books, 1745-1789 and 1815-1889; receipt books, 1598-1851; cash books, 1602-1784; fair cash books, 1713-1851; rough cash books, 1713-1810, miscellaneous ledgers and cash books, 1787-1819; materials sold, 1614-1682; corn and granary books, 1568-1714; rent and arrears books, 1707-1941; papers relating to individual properties owned by the Trust, particularly leases and grants, and administrative papers.

Records of the Battersea Bridge Company, 1771-1882, including deeds and other legal documents; minutes of meetings; financial accounts and correspondence.

Records of the Fulham Bridge Company, 1739-1770, comprising minutes of meetings.

Records of the Joint Committee of the Corporation of the City of London and the Metropolitan Board of Works for freeing Kew and other bridges from toll, 1864-1889, comprising minutes of meetings and reports.

Records of the Staines Bridge Commissioners, 1828-1870, comprising account of bonds. Records of the Vauxhall Bridge Company, comprising plans and sections of the bridge, its approaches and the riverbed, 1878-1880. Records of the Strand Bridge Company, 1809-1814, comprising share and annuities certificates.

Papers of Professor Henry Taylor Bovey, [1892]-1908, comprising research papers and notes relating to the strength of materials, hydraulics and electrical engineering, design of bridges and the pin-connected principle, [1892-1902]; papers relating to engineering and mining courses, [1898-1908]; address as Imperial College Rector, 1908.

Records of the Bridge House Estates relating to Blackfriars Bridge, 1753-1967. Papers include accounts; surveyor's papers and other material relating to maintenance; wage books; reports; petitions; papers relating to tramways; photographs and programmes, including for the laying of the foundation stone of the new bridge, 1865.

Records of the Proprietors of Battersea Bridge, 1771-1796. The two minute books record the earliest proceedings of the 15 proprietors of Battersea Bridge, and include a list of subscribers and copies of circular letters.

Records of the Proprietors of Battersea Bridge, 1842-1871, including a copy of a statement on tolls sent to the Committee of Metropolitan Bridges, copies of questions submitted on the Thames Navigation Act 1870 and on Albert Bridge, copy of an agreement and a copy memorial sent to the Examiners of Standing Orders for Private Bills of non-compliance with standing order.