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4 St. Ann's Square, Manchester.
1877 Patent 4014. And Edward Hamer and James Metcalfe, both of Aberystwyth, in the county of Cardigan, and Edward Davies, of Llandinam, in the county of Montgomery, have given the like notice in respect of the invention of "improvements in apparatus for feeding locomotive and other steam boilers or generators, applicable also for raising and forcing liquids for other purposes."
1878 Company established at the Rheidol Foundry, Aberystwyth, as Williams and Metcalfe
1880 Patent. 'Patent granted to Edward Davies of Llandinam, in the county of Montgomery, for an invention of "Improvements in Apparatus for feeding locomotive and other Steam Boilers or Generators applicable also for Raising and Forcing Liquids for other purposes"
1888 'We are informed that Messrs. Sharp, Stewart & Co. (Limited), of Manchester, who are removing to Glasgow, have disposed of their injector business — together with the goodwill of the same — to the Patent Exhaust Steam Injector Company (Limited), 4 St. Ann's Square, Manchester. This latter company take over the drawings, patterns, and templates of the injectors of various classes, as well as the stock of standard live steam and exhaust injectors which Messrs. Sharp, Stewart Co. had on hand. The services of the most skilled amongst the workmen are also retained, so that customers may rest content the business will be carried on with the same accuracy and dispatch as was the chief characteristic of the retiring firm.' 
became Davies and Metcalfe