Nice work, Graham. I'm glad to hear that you made the call and established your rights.

Here's a thought I have had before - there are penalties for violating valid copyrights, but there are no penalties for claiming a copyright that one is not entitled to. I think about it every time I see a piece by London Pro Musica claiming copyright to a piece from 1600, or Schirmer claiming copyright to a piece that John Jacob Niles collected from somebody else in the 1930's.