SO ENDS this first of two weekends on the twelfth century text on how to do crafts by Theophilus. Even today, there are gems in this work for those interested in the crafts. Above all, it is an insight into the depth of knowledge of these people and the amount of skill needed to do their work. Never again visit a museum and see a painting, a piece of glasswork, or metal work from this period or before, and forget the true depth behind each one.