I'm doing a pencil study using Maughan's technique of defining shapes and using value to create form.
I've just started but thought I'd show the early stages. I am using a portrait drawing of mine as a kind of reference:
I'm also having to think about it a little differently to normal as I would normally be drawing this on a 'Half toned' piece of paper, and adding the highlighted areas right at the end with a white pastel pencil, with this being on white paper, I have to think about the highlighted areas as I go.
Here is the beginning stages of the drawing. Mechanical Pencil on A4 Sketch book: