Andrew Wyndham knew he was addicted. But his drug of choice wasn't alcohol or some other reality-altering substance. It was hours a day spent doing contour line drawing.
Artists generally use this type of drawing as a warm up—the way pianists use scales to get their fingers limber. The practice, which involves focusing on the subject and drawing without looking at the paper, helps to train the eye and to cultivate an artist's sensitivity to his surroundings. But even serious artists usually spend less than an hour a day on this discipline.
Andrew was doing it four to five hours a day.