I'm going to refresh this thread because when I posted the link directly above, we'd just had the Great Mudslide of '11 and it never really got its chance at the top. Thomas Frandzen's message in that Boswell website is well worth reading for anyone interested in his musical connections.

The thread with the link to the 1812 Eliza Ross Ms. is here

Online: Scottish music manuscript 1812

http://mudcat.org/thread.cfm?threadid=139551