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John Robson of Alexandra Works, Shipley
1870 Company formed by John Robson
1891 Advert. 'The Shipley Gas Engine. Simplest, Cheapest and Best. Awarded Gold Medal at Leeds Exhibition. See the engine working at Stand 29, Agricultural Show, Bradford. Sole Maker. John Robson, Shipley.
1900 June. Royal Agricultural Show at York. Showed an engine. 
1903 Advert for a Machine Man. John Robson, Alexandra Works, Shipley.
1907 Advert for the sale of a gas engine of 16 bhp. John Robson (Shipley) Ltd.
May have made some Fairbanks and Morse engines under licence
1970s Company ceased trading