hi Chris,
I have found James Gibson, teacher of music and singing, living with wife, Elizabeth in 17 Marsheam Steet, Maidstone, Kent on the 1851 census. he was 48 and Elizabeth 40, they had some childre staying with them,
Robert - 17 b 1834 St Pancras, London
James - 13 b 1838 St pancras, London
Jane - 6 b 1845 St Pancras, London
Elizabeth - 4 b 1847 Maidstone Kent
Thomas - 3 b 1848 Maidstone Kent
Mary - 1 b 1850 Maidstone Kent
I have also found him on 1841 census at Bayham? St, St Pancras, Middlesex
James Gibson 40 b Scotland - Professor of Pianoforte
Elizabeth 30 b outside of county
William 15 born in county
Robert 8 born in county
Thomas 6 born in county
James - 4 born in county
Barbara Shepherd 30 born in county Laundress (sister of Elizabeth?)
Henry Shepherd 6 born in county
You may have this info already, but it will help people with dates of birth when searching.
Tom