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Iron manufacturers of Perseverance Works, Kirkstall Road, Leeds.
See Joseph Whitham
One of the first manufacturers in Leeds to make processing machinery for the leather trade.
Maker of stationary engines. 
c.1840 Thomas Greenwood worked at the Perseverance Works for a short time.
1861 Leather machinery available consisted of bark mills, leather rolling mills and splitting machines.
1873 Two beam engines for Nottingham Waterworks, Bestwood Pumping Station. Photographed by George Watkins in 1935. Note: G Watkins refers to the maker as Joseph Whitham & Co., but the nameplate in the photograph says 'Joseph Whitham & Sons' 
1876 Members of the Iron and Steel Institute visited their ironworks 
1885 Advert for sale of works and machinery
1885 Greenwood and Batley branched out into Flour and Oil Milling Machinery by acquiring the business of Joseph Whitham and Son of the Perseverance Iron Works, Kirkstall Road, Leeds