I don't know how complete or wide-ranging their scanning is, but Google Books only shows that one volume, The border reivers, as a source:

http://books.google.ca/books?id=QaRn...ed=0CCgQ6AEwAA

I assume you are looking for the original source document, but if it's not footnoted or referenced to the specific work in the bibliography you're in for a long search...