The next 20 years he spent illustrating and [[calligraphy|calligraphing]] the story using graphite on parchment as the [[medium]] with the intent to produce them in [[color]] when computer technology would facilitate coloring the black and white images. | The next 20 years he spent illustrating and [[calligraphy|calligraphing]] the story using graphite on parchment as the [[medium]] with the intent to produce them in [[color]] when computer technology would facilitate coloring the black and white images. |