After the rough pencil is approved, a detailed pencil (left) is drawn. There were only minor changes made from the rough for this figure, however, the other figures required many changes; in fact, the toughest part of this project was getting the pencils approved for historical accuracy.

After this detailed pencil is approved, it is transferred to a piece of Essdee scratchboard.

Tip:
Essdee is the best scratchboard available, but Clayboard comes in a close second. You can buy both boards at dickblick.com. Do a search for "scratchboard" from the Dick Blick Art Materials website. They also have all the tools necessary for working with scratchboard.