Hi - Hope this will help, guess you've looked in Somerset but it may give a new lead...
1851 Census: Broad St, South Molton, Devonshire
Mary Ann CHAPPLE Wife M 36 F Milliner South Molton-DEV
Mary Elizabeth ROWCLIFFE Vist U 19 F Minehead-SOM
1851 Census: ROWCLIFFE William 27 Ag Lab bBishops Hull, Som in Kingston, Som
http://www.genuki.org.uk/big/eng/SOM/BishopsHull/index.htmlhttp://www.genuki.org.uk/big/eng/SOM/Kingston/http://www.genuki.org.uk/big/eng/SOM/Minehead/https://familysearch.org/search - gives Rowcliffe in Somerset, Bristol area etc.
May be worth looking for a will...
http://discovery.nationalarchives.gov.uk/details/r/D630984 (for example, will of a woolcomber in Somerset)
http://www.victoriacountyhistory.ac.uk/explore/themes/indust...(inc woolcombers in Somerset etc)
Good luck.