Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,501 pages of information and 233,940 images on early companies, their products and the people who designed and built them.
Robert Spence of Bridgwater
1864 Partnership of Murch and Spence, between William Edward Murch and Robert Spence, iron founders and engineers of Eastover, Bridgwater, dissolved by mutual consent. Business to be carried on by Robert Spence 
Supplied a two cylinder steam pumping engine to Saltmoor Pumping Station, near Bridgwater. This was photographed by George Watkins in 1934.  He postulated a date of 1867 - 70. Note: the text ascribes the engine to R. Spencer rather than R. Spence ('R. Spence' is visible on the nameplate).
Engine production was continued by J. Culverwell, whose surviving engine shares some of the characteristic features (and possibly foundry patterns) with the Saltmoor engine