sketching on kraft paper, & pen / ink

So here are some sketches I did last week. The first pic shows exercizes from a book I got from the library, "Pen & Ink Techniques" by Frank Lohan. Great book -- particularly because the author gives you exercizes to do, rather than just showing you examples of pen & ink drawings and leaving you to figure out how to do them (as some other drawing books do).

This is a sketch I did of my friend G., reading. K. is camera shy and doesn't like being drawn, but I'll try to sneak a sketch of him in one of these days. I'm enjoying using the brown paper -- the paper itself becomes the midtone of the drawing, and you add the highlights with white chalk.