was William [father] a french polisher ,if so in 1853 according to the Historical Directories site was living at 19 Pembroke Street Liverpool.It may just help in your census search.I also noticed a marriage on the IGI of a William Thomas Fouchard in 1874 in Manchester, the family could have moved to that area.It will be a couple of weeks before I go to the record office ca you send me a reminder please if you haven't sorted things
Dotty