[Bards] Free public domain sheet music

[Catrin ferch Maelgwn]

This is probably old news to many of you, but I've just discovered the
Petrucci Music Library.  Here you can legally download free sheet
music from ancient to modern, and everything in between.  The link
below allows you to browse by time period; there appears to be a
pretty fair selection of medieval and renaissance work available,
though it's obviously still growing.  I thought it might be a valuable
resource for the musicians among us.

http://imslp.org/wiki/Browse_by_composer_time_period

The Internet is neat.

-Catrin