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Marshall, Sons and Co of Britannia Iron Works, Gainsborough, Lincs.
The company was a British machinery and Traction Engine manufacturer. Marshall's produced large numbers of steam traction engines, steam rollers and agricultural machinery of all types. Later production included diesel tractors such as the Field Marshall and Track Marshall.
1842 William Marshall originally an agent for William Fairbairn and Sons branched out on his own and purchased the defunct engineering works of William Garland and Son at Back Street Foundry in Gainsborough.
1848 Company established.
1849 Renamed as Britannia Ironworks and commenced production of road steam engines.
1861 His other son Henry Dickenson Marshall became a partner in the business.
1861 Employing 21 men and 10 boys. 
1861 William Marshall died; the 2 brothers took over the running of the business. Under their direction steam engineering became one of the major parts of the business and it remained so until at least the First World War: portable engines of all sizes, traction engines, stationary engines, and boilers were manufactured and exported to markets around the world.
1862 Incorporated as a Limited Company as Marshall, Sons & Co. Ltd
1871 Employing 521 men and 85 boys 
1876 First traction engine produced.
1876 Exhibitor at the Royal Agricultural Show at Birmingham with a new expansion gear actuated by the governor. Details of their feeder for sheaves. 
1878 Built a railway locomotive and two more in 1898 and 1902.
1881 Employing 1,437 men and 137 boys 
1888 Issued catalogue of tea-preparing machinery with steam engines and boilers. Second catalogue on engines - portable, semi-portable, traction, fixed, horizontal and vertical, condensing; boilers, locomotives and vertical, and saw benches. Another section on road locomotives, portable and fixed engines, thrashing machinery, elevators and mills. 
1894 Catalogue of Tea preparing machinery. 
1895 Horizontal Engine with gear drive for Stockport Waterworks (Wilmslow Station).
1911 Smithfield Club Show. Exhibited a new steam tractor, a portable engine, a thrashing machine, a patented fire-box and various accessories.
1911 Horizontal Rotative Engine for Chatham and Rochester Waterworks (Luton Station). 
1913-1917 For a list of the models and prices of Steam Motor Wagons, Tractors and Ploughs etc. see the 1917 Red Book
1913-1917 For a list of the models and prices of Paraffin Commercial and Agricultural Motors, Tractors, Ploughs, Sprayers, etc. see the 1917 Red Book
1914 Agricultural and General Engineering for Home and Abroad. Specialities: "Marshall's Oil Tractors" and Jackson's Patent Tea Machinery. Employees 5000. 
1920 February. Issued catalogue on Cornish, Lancashire and water-tube boilers. 
1920 Royal Agricultural Show at Darlington. 16 bhp portable oil engine (illustrated). 
1922 In the show held by the Bedfordshire Agricultural Society at Ampthill, Beds. on the 20th, they were awarded a silver medal for the "Marshall" Class "SM" all-steel finishing thrashing machine.
1925 Mr W. F. Weston became a county representative of the company.
1925 The company secured a contract to supply the Greek Government with 100 compound steam road rollers of the "Marshall" latest Class "S" series.
1926 - December. Awarded two gold medals and three bronze medals at the Presidency Agricultural Show, Poona, India in October last. One of the gold medals was given for the "Marshall" all-steel frame thrashing machinery.
1927 See Aberconway for information on the company and its history.
1934 As result of continued poor trade, the company was placed in receivership
1936 Marshalls, Sons and Co (Successors) Ltd was formed as a private company to acquire from Thomas W. Ward Ltd the property undertaking and assets of the engineering business of Marshalls, Sons and Co Ltd est 1848. Converted into a public company. 5 member of the Ward family were on the board
1936 1st AGM. Joseph Ward is Chairman 
1937 2nd AGM. Joseph Ward is Chairman and Ashley S. Ward is deputy-Chairman and Managing Director 
1937 Engineers and boiler manufacturers. 
WWII Made Diesel tractors and rollers, dumpers, concrete machinery, tea machinery, steam plant boilers, and work for the war effort
1943 Name changed to Marshall, Sons and Co Ltd
1961 General engineers and machinery manufacturers, producing diesel crawler tractors, diesel road rollers, diesel wheeled tractors, distillation plant, tea preparing machinery, fire tube packaged boilers, earth moving equipment, heavy fabricated steel work, diesel shunting locomotives and wire drawing machinery. 3,048 employees. 
1970s The factory in Gainsborough was derelict in the 1970s. There is now a supermarket standing on (part of) the former Britannia Iron Works site.
Marshall, Sons and Co. built the boiler for the Fairbairn steam crane which stands on the dockside in Bristol. The maker's plate reads "Marshall Sons and Co. Ltd., Engineers, Gainsboro, England, No.92766".
There is a Marshall portable boiler currently restored and in use as the steam source for the Westonzoyland Museum