Toccata and Canzon by Bernardo Storace.
This example from Storace's sole manuscript dated 1664 contains many cases where it is not clear whether to play e-flat or e-natural.
GIF files for on-screen viewing
Page 1,
Page 2,
Page 3,
Page 4.
PDF file for download and printing. (If you should get a blank page, try clicking "back" then "forward")
Link to page on Storace's Passacaglias
