Hi. This is a VERY modest attempt at a 3-toned, 20 minutes shading exercise. The character was invented -- and ha, I'm sure that it shows. I was also working small, about 2x3 inches with a carbon pencil on plain white copy paper. The value plan was kept very simple on purpose since this is a first try :-). Keeping in mind that the light was coming from high and in front of the subject I started by establishing some "butterfly-lighting" style shadow shapes - the darkest tones in the drawing.. Then I added some mid-tone shading working from bottom-to-top and from side-to-side, thinking of the head as a typical "egg" and "cylinder" shape. I left the white of the paper showing on the forehead and nose ridge as the lightest/highlight tones in the drawing. That's it -- 'just a quick, first try at shading a portrait. Certainly can't go anywhere but up from here. Comments and critiques are always welcomed. Cheers!