Forgot to say...........John was a cork quarterer.
Back home in Salford:-
9 Cellar, Wheathill
Salford
Lancashire.
John Caster abt 1797 Lancashire, Head Painter
Mary Caster abt 1803 Lancashire, Wife
Samuel Caster abt 1848 Salford, Lancashire, Son
Eliza McStay abt 1833 Manchester, Lancashire, Head
Margt McStay abt 1858 Salford, Lancashire, Head
Eliza has no occupation listed and is living with the Caster family. Eliza is listed as head but the doc is not 100% clear and it could be "Header". Margaret has ditto marks in the same column.
Hope this helps.
The ref is -
RG9/2916
Folio100
Page 34