Hello again, Brian - Is the 1891 surname exactly as you sent it viz Fargher not Faragher? Is that a transcription source or from the enumeration page itself? I know that Fargher is a well known variant of the surname and may all be down to local pronunciation.
The family have now been traced in the 1901 Census! A friend of mine used wildcard searches online and discovered the family go by the surname FARGBER in the 1901 on-line transcription. Also Sophia must have died as Walter's wife was Rachel now. Regards, Gil