Unfortunately it looks like the wrong family as in 1851 they were living in Liverpool:
1851 Census:
6, Court 5, Hotham Street, Liverpool
GOLDSMITH, Robert Head Married 1808 Journeyman Joiner Isle of Man
GOLDSMITH, Elizabeth 1809 Isle of Man
GOLDSMITH, Elizabeth Dau 1837 Liverpool
GOLDSMITH, Mary Ann Dau12 1839 Liverpool
GOLDSMITH, Grace Dau 10 1841 Liverpool
GOLDSMITH, William Son 8 1843 Liverpool
It is Mary Ann that I am a descendant of, but I have most of the information for her so it is the parents I am now trying to trace.