Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 134,617 pages of information and 213,708 images on early companies, their products and the people who designed and built them.
Following the success of the Birmingham Mining and Copper Co, it was soon followed by the foundation of the Rose Copper Company.
1797 the Rose Copper Smelting Co. took over and "considerably enlarged" a smelter on the river Tawe which had been operated since 1780 by Fenton and Co, of Leeds. This partnership produced mainly for the market rather than for meeting the requirements of the members who included Matthew Boulton, Joseph Gibbins, W. and A. Baldwin, Walter Gibbon and T. Holbrook (the latter having been the Swansea agent of Fenton & Co.) 
1823 the Grenfell, Williams and Fox partnership took over the Rose Copper Works in the Swansea valley.