In November 1777, Abraham Darby III began designing and erecting 378 tons of cast iron, to build a bridge in the Shropshire gorge, on the banks of the River Severn. The bridge was completed in ...

Beckett, Derrick Great Buildings of the World: Bridges, Paul Hamlyn, New York (New York), 1969; pp. 52-64. Billington, David P. The Tower and the Bridge, Princeton ...