Main article: Marshall, Sons & Co. The firm of Marshall was formed when T.W. Ward of Sheffield took a major stake in the Old established firm of Marshall, Sons & Co. of Gainsborough, in the 19203 following the decline in agricultural machinery in the depression. The Marshall Sons & Company Ltd, was from 1848 based in Gainsborough, England. They started out as Blacksmiths then progressed to building Steam traction engines, steam rollers and threshing machines. By the early 1900 sales of Steam eng