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Thomas Larmuth & Co., of Todleben Works, Salford, Manchester.
Makers of machinery for rock-drilling.
1841 Listed as Thomas Larmuth, Mechanic, Machine Maker of Victoria Arches, Victoria Bridge and 19 Queen Street, Salford. Also listed is Matthew Larmuth, Machine Maker of 13 Bolton Street, Salford. 
1853 Listed as Thomas Larmuth, machine chain manufacturer of Cross Street, Salford and living at Mount Pleasant Square, Salford. 
1865 Advertisement: 'TO BE SOLD, ONE 12-Horse Cornish BOILER, new March, 1864 ; makers, Messrs. Hill and Co., Heywood: now working at Thomas Larmuth and Co., tool makers, Bury-street, Salford.'
1880 Advertisement in The Engineer: makers of T. Sturgeon's Patent Trunk Air Compressor, winding, pumping, horizontal and vertical Engines, and every description of winding machinery.
1887 'The Thirlmere Water Scheme.- Messrs. Morrison and Mason, Glasgow, the new contractors for the above work, have ordered from Messrs. Thomas Larmuth and Co., Salford, entirely new rock-boring machinery, consisting of the Patent Hirnant Rock Drills, rock drill carriages, and other appliances. It would seem from this that they intend to push the work forward in a businesslike manner. Messrs. Morrison and Mason have Larmuth's machinery working in the Mugdock tunnel, on the Loch Katrine works, for the Corporation of Glasgow.'
1893 Larmuth 'Hirnant' steam-driven compressor for the Meyer and Charlton Gold Mining Company.
1895 Listed as Engineers and Machinists, Ironfounders, Mining Engineers of Unwin Street, Cross Lane, Salford. Note: Also listed is Matthew Henry Larmuth, Engineer, 24 Eccles Old Road 
1909 Advertised as specialists in a wide range of machinery for the manufacture of electrical wires and cables 
c.1910 Makers of machines for producing rope and twine 
1931 In voluntary liquidation 
Larmuth's Todleben Works was located immediately west of Salford Cattle Market, with access from Unwin Street.