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of Bassingbourn Iron Works, Royston
of Letchworth, and of 110 Cannon Street, London.
1901-06 Built the Rational Cars
1903 Began the building of the Rational engine at Bassingbourn in 1.5, 3 and 6 hp sizes 
1904/5 Moved to Letchworth and built the first factory at Letchworth, called Gresham Iron Works. Manufactured railway materials, especially the component parts of the continuous automatic vacuum brake, and industrial oil-engines.
An associate of Gresham and Craven of Manchester
1904 July. Details of the Rational car.
1931 Exhibited their 'National' oil engines, vacuum brake exhausters and flood lighting equipment
1930s Ceased trading