Cast iron swivel bridge at St Katharine's Docks, 1838.

Plate VIII: Elevation and Plan of a Steam Boat; Maudslay's Steam Engine; Murray's Steam Engine.

Lock plate, French.

Sea lock at Clachnaharry, Invernes, 1838.

Bogie tender for NZGR 4-6-0 (E1173) 1900.

Canals and Locks: Rees' Cyclopaedia

Canal lock gates, 19th century.

Government of India Class O metre gauge 4-4-0 1886.

Western Australian Government Railways 3ft 6in gauge 2-8-0 locomotive 1896.

Locks on the Ellesmere and Chester Canal, 1838.

Lancashire & Yorkshire Railway signal cabin lever frame, locking frame cradle & top plates

Construction of the Panama Canal, Panama, 1912.