Hi, Janey,
I have had a look round for you but quite honestly if Casalguidi can't spot them then I'm sure that I can't. We do use the same search methods so any mistranscriptions are usually no problem.
In 1881 Elizabeth, the wife is back with the family, confirming it is correct. I suspect that maybe Thomas John and Elizabeth may be together in 1871 but goodness knows where.
This is 1881
Eliza Valsler abt 1831 Chatham, Kent, England Wife Rochester St Margaret
Henry A. Valsler abt 1867 Rochester, Kent, England Son Houseboy Rochester St Margaret
James R Valsler abt 1833 Chatham, Kent, England Head Plumber Rochester St Margaret
William H. Valsler abt 1863 Rochester, Kent, England Son Printer Rochester St Margaret
James is indexed as James A but it looks like R on the census.
I'll have another look on 1871 but don't hold your breath.
Tricia