Loosening Up With A Sketch

Here I have begun to do a preliminary sketch to loosen up a bit and to help myself become more familiar with my subject.  I am using a toned paper and prismacolor verithin pencils in Terra Cotta and Black with White highlight, to do a Trois Crayon style sketch.

The sketch at this stage shows the outline of the "envelope" of the head.  Some lines are inside the head envelope to map out where bone structure is.  I have also started to map out the shadow placement on the face and neck.