Welcome to the forum . I am glad you find the forum interesting. However you are incorrect as to the number in Farm St . 28 is the number in the enumeration district, not the number of the house. At that time many houses were not numbered, and even if they were the number was not always included in the census information. The Corporation directory of 186I does list Charles as an engine fitter at 395 Farm St. Interestingly there is there also listed a George Lichfield, pork butcher at 52 Snow Hill . Possibly a relation as Lichfield is not a very common name in Birmingham at this time , and maybe in 1851 Charles was working with him. I am not sure what the number in 1851 was , though it could be the same house as in 1861