sentences:  Initially like most other manufacturers they built portable engines but they gradually moved into self-moving agricultural engines and later engines built specifically for road transport.In 1856 they built the first road haulage engine in conjunction with James Boydell.Boydell had invented a system where flat boards were attached to a wheel loosely at their centers, as the wheels revolved they were capable of spreading the weight of an engine over the surface of the board, versions of these became known as Dreadnaught Wheels.