Hi Greggy/Anne,
Are you aware on the Vaughan William Memorial Library - Online?

Go to web site - http://library.efdss.org/cgi-bin/home.cgi
Where is says - Search Indexes, press and "slip" curser to "Cross Search"
This will reveal input windows - In first (Next to following words" enter "Wiltshire"
Clip and hold the "All Fields" and this will reveal the option "Place Collected"
Select that and press "Submit Query"
You should get details of 442 songs collected in Wiltshire, etc and where they can be
obtained - ie. Manuscript or book, etc..
You can do the same with Somerset also.
Using the source info., you can search online via Google for more details on the songs, etc..

Good Luck and Happy Hunting..

Tim Radford