Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 130,446 pages of information and 207,488 images on early companies, their products and the people who designed and built them.
A. G. Mumford, maker of steam and oil enginers, boilers, pumps, of Culver Street Ironworks, Colchester.
1888 Compound Yacht Engine. 
1889 Steam launch engines. 
1890 Illustration and article of their steam ballast pump using Mumford and Dalby's patent valve gear. 
1900 July 20th. Vertical Compound Surface-Condensing Engine for HM Dockyard at Chatham. Illustrations and article. 
1905 Company incorporated
Much of the work of this company was for the Admiralty. He produced a complete range small compound surface condensing marine engines. There were also some larger engines suitable for yachts, tugs and cargo boats.
1920 Public company. A. G. Mumford retired from the chairmanship but remained on the board.
Boiler feed pump. Exhibit at Bradford Industrial Museum
Known for his donkey pump, an example of which can be seen at Westonzoyland Museum
1933 The founder died and the goodwill was acquired by G. and J. Weir
No. 3 steam boiler feed pump without a date. (Exhibit at Birmingham Thinktank museum)