Google books might have the books you'd like to see.  I read some notes
Ms.Harris wrote here:

http://books.google.com/books?id=yH13sFcsjYUC&printsec=frontcover&dq=Twain+%3D+Joan&ei=fadNSeLLFZSokAT9_OnUCQ#PPT1,M1

Good luck!
Arianne Laidlaw