W. and J. Walker
W & J Walker of Manchester.
1837 Listed as machine makers, 22 Mosley Street [1]
1841 Listed in Pigot & Slater's Directory as hot water apparatus manufacturers, 22 Mosley Street. William Walker's home address: 5 Chorlton Terrace, Upper Brook Street
1839 Reference to boilers purchased from Nasmyth, Gaskell and Co [2]