Additions, July 26, 2007

These are both actually from Diego Ortiz, El Primo
Libro, 1553. He doesn’t bother crediting Arcadelt.

• Arcadelt, O
  felici occhi miei
• Ortiz, Ricercada
  segunda sobre [O felici occhi miei], which is divisions on the
  top line of the Arcadelt. I have printed the tune and the
  divisions in score.