[note 2] In 1856 his eldest son, James Eglinton Anderson Gwynne (1832–1915), of Essex Street Wharves on the south side of The Strand was awarded a patent for the manufacture of carbon or charcoal powder.
[1] Their Strand site became part of the Victoria Embankment built between 1865 and 1867 and Gwynne profited from judicious investment in the reclaimed land.
After the company was dissolved in 1927 the pump-making business continued under the ownership of Gwynnes Pumps Limited which belonged to Fosters of Lincoln.
Subsequent ownership was: W H Allen Sons & Company, Vickers then Amalgamated Power Engineering of Bedford before Gwynnes' separate identity disappeared in the 1970s.
[4] They took W F Adam MIMechE MIAE with them to manage the bodybuilding and moved production to Gwynnes' Chiswick works now at the end of Pumping Station Road.
By this time, 1961, Gwynnes products still remained in demand all over the world in their various sizes from Nuclear Power Stations, oil refineries, dry docks, dredges down to coal mines and pumps for many other materials as well as liquids.