Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 146,010 pages of information and 231,555 images on early companies, their products and the people who designed and built them.
Dunford and Elliot of Maritime Buildings, Queen Street, Newcastle-upon-Tyne
of Attercliffe Wharf Works, Sheffield (1921) (1935).
1900 A revolving cylinder engine on the Ljungstrom crankless principle. 
1901 Steel importers and merchants, coke merchants, of High St, Sheffield; head office Newcastle-upon-Tyne.
1905 Steel importers and merchants, of Lancaster St, Sheffield.
1911 Steel merchants, of Attercliffe Wharf, Sheffield.
1917 Advert for hollow shafting. (of Attercliffe Wharf, Sheffield) 
1937 Steel manufacturers and engineers. "Dunelt" Carbon, Alloy, Stainless Steels. 
1940 Advert for hollow steel bars (of Attercliffe Wharf Works)
1945 Advert for hollow steel bars (of Attercliffe Wharf Works)
1953 Placing of the share capital on the Stock Exchange, makers of rolled steel bars and sections for the motor car, aircraft and engineering trades; hollow drill steel for mining; drying plant for the food industry, and industrial process controllers.
1967 One of the larger steel companies not subject to nationalisation
1968 The group consisted of - 
1968 Dunford and Elliott (Sheffield) would become the holding company for the group; Dunford Hadfields would constitute the steel operations; Newell Dunford Engineering would hold the engineering activities
1970 Merger with the privately-owned Spartan Steels and Alloys.
1977 Dunford Hadfields foundry closed
The British Motorcycle Directory - Over 1,100 Marques from 1888 - by Roy Bacon and Ken Hallworth. Pub: The Crowood Press 2004 ISBN 1 86126 674 X