Undated – completion of William Edwards' Old Bridge, Pontypridd. With a 140 ft (43 m) span it becomes (by 10 ft) the longest single-span bridge in Great Britain, remaining so for 40 years.[6][7]
^Bryant, Christopher (2014). Parliament: The Biography. Doubleday. ISBN 978-0-85752-224-5.
^ abcWilliams, Hywel (2005). Cassell's Chronology of World History. London: Weidenfeld & Nicolson. p. 318. ISBN 0-304-35730-8.
^"History of the Marine Society". Archived from the original on 2007-09-27. Retrieved 2007-09-03.
^Urban, Sylvanus, ed. (1756), The Gentleman's Magazine, D. Henry & R. Cave, p. 462
^ abcEverett, Jason M., ed. (2006). "1756". The People's Chronology. Thomson Gale.
^Ruddock, Ted (2008). "The Theory of Arches and Pontypridd". Arch Bridges and their Builders 1735–1835. Cambridge University Press. ISBN 978-0-521-09021-6. Retrieved 2009-01-19.
^Skempton, A. W.; Chrimes, Mike (2002). A Biographical Dictionary of Civil Engineers in Great Britain and Ireland: 1500 to 1830. Thomas Telford. pp. 217–18. ISBN 0-7277-2939-X.
^"Sir Henry Raeburn (1756-1823)". National Records of Scotland. 31 May 2013. Retrieved 24 June 2022.