Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 135,687 pages of information and 217,205 images on early companies, their products and the people who designed and built them.
1840 Partnership dissolved between Thomas Anderson and James Tedswell, Minshull Street, Manchester, machine makers 
1850 Listed in Slater’s Manchester & Salford Directory under 'Machine Makers and Tool Makers and Dealers', at Canal Street and Minshull Street. The 'Streets' section of the directory places the premises as the first building in Canal Street from Minshull Street. Reference to the 1849 O.S. map  shows Minshull Street Iron Works (Engines & Machines) at this location.
Adshead's 1851 map identifies the building as J. Houtson & Co's Machine Works.