One of my Genuki colleagues has pointed out Microsoft's book search site now
in beta (and images,maps etc etc).
All you get is a search box - try it, click on Books in menu bar then type
in Glamorgan and you get 222
hits - books with the name in somewhere.
You can navigate through the books by scrolling down, and then search within
a book for instances of the name.
Put an exact search phrase in quotes
You can also download a complete book in pdf format.
No need to sign in (not sure what is different if you do).
Genuki Wales http://www.genuki.org.uk/big/wal/
Help Page http://home.clara.net/tirbach/hicks.html