It would seem that the James Richard living with John and Esther Hardy on the 1841 census is the one linked to my great grandfather. His occupation is listed as ap plumber. His marriage certificate, 1851 census and birth certificate of son lists him as a plumber. However, as pointed out, John is listed as laborer on 1841 census but as hatter on James Richard marriage certificate. The Peter listed above was a hatter. If he is the father of John, could there have been a change in profession?