I've done a little more work on the face, but here's where I slow down considerably. Drawing the trees was so much fun, but now I get to work on a face, which is my favorite, and I don't mind taking my time. Here you can see the scale, as I've placed my hand directly onto the paper.
I'm working from a very washed out photograph, and I need to add a lot of color and shadowing to make it look more real. Next week I'll post the reference along with the drawing in progress, so you can see the changes that I've made.