Hi Guidinglight. Great job! You have very nice tones happening. If I could offer a little critique. The left side of the drawing which is the shadow side looks a little out of balance. The ear is very light compared to the original I would darken that area up to match the photo.
every once in a while step back from your piece and make sure your in balance to the original. I think that's key to the success of any drawing.
Great job!! Keep posting!!!
Marc F.
Marc Forest.
http://www.marcforest.com