I'm a long-time fan of your work. I drew a pastel of this photo as a study, and now I'd like to show it in a small artshow (local library). I'm writing to ask your permission. Also, in the event someone wants to purchase it, may I sell it? If you wish I can split the profit with you. You can see the work here: [link]age=3
It's post 66 in my sketchbook thread on conceptart.org (page 3)
You will see I gave you credit there for the original image.