Aaron J. Rabushka wrote:

>Perhaps it was something else (other than the FitzWilliam) that he (Bach)
>copied by moonlight.  I'd heard that he copied a book that he had to sneak
>from his brother who wouldn't let him use it.  It's been a long time since
>I've heard that story, and I don't remember the source.

What I remember from the story was that Bach copied the Fiori Musicali by
Frescobaldi.  He apparently snuck this from his older brother and copied
it either by candlelight or moonlight.

--Wes Crone