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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. 
1851 Thomas Larmuth is living at 13 Bolton Street, Salford (age 54 born Exeter), Machine Maker employing 130(?). With wife Mary (age 52 born Durham) and their children Mark O. (age 27 born Worcester), Surgeon Undergraduate London; Thomas (age 25 born Bridport), Machine Chain Maker; Cath O. (age 23 born Bridport), Matthew Henry (age 19 born Salford), Machine Chain Maker; Alfred A. (age 15 born Salford); and Luke Hamilton (age 7 born 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.
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.