"Gwynnes Limited was a City of London England engineering business, iron founders and pump makers founded in 1849 to capitalise on the centrifugal pump invented by James Gwynne (1804\u20131850). In 1856 his eldest son, J E A Gwynne, of Essex Street Wharves on the south side of The Strand was awarded a patent for the manufacture of carbon or charcoal powder."@en . . .