Did we ever get a definitive answer to this? Are Scott's song manuscripts available online anywhere?

I just got back from Jim & Susie Malcolm's Scotland Borders tour, and we spent a lot of time in the haunts of Sir Walter Scott and of Robert Burns. We visited Scott's home, Abbotsford; and also Smailholm Tower, which has dioramas depicting a number of the more popular ballads Scott collected. When I came home, I found that Google Books and the Gutenburg Project have online copies of Scott's Minstrelsy of the Scottish Border, but I haven't yet determined whether this work is two volumes or three. I hadn't had any knowledge of Scott's work with music before this, so now I have a new world to explore.

So, back to my original question: Are Scott's song manuscripts available?

-Joe-