Cowperthwaite, William (1797-1817)
Cowperthwaite, William, Manchester, cm (1797–1817). At 21 Back Water St, 1797–1813 but by 1817 at 7 Christchurch Sq., Hulme. [D]
The original entry from Dictionary of English Furniture Makers, 1660-1840 can be found at British History Online.