This is a great documentary on tenors from the BBC. Roland Villazon is simultaneously charming and insightful. It's interesting for those in the know and informative for those who aren't. If you have 60 minutes to spare, you should watch it. Thanks to my former teacher Dale Morehouse for pointing the way.
Flow my tears was John Dowland's most popular work. It was first published in 1600 in his collection of lute songs. I'm playing an adaptation for piano, but all the notes are those indicated in the original lute tablature.