About Mark Tumber Mark is Canada's best-known illustrator. An extremely talented artist and interestingly colour blind! Mark is able to pick up the smallest grayscale differences in faces. We have selected some of his best and most unique celebrity illustrations for you! Mark's website is at www.marktumber.com Price: $950.00 Price: $950.00 Click For Bigger View Original Sketch by Artist Mark Tumber of Mike Weir. Click For Bigger View Original Sketch by Artist Mark Tumber of Wayne Gretsky. Price: $950.00 Price: $950.00 Click For Bigger View Original Sketch by Artist Mark Tumber of Paul McCartney. Click For Bigger View Original Sketch by Artist Mark Tumber of Bono. Price: $950.00 Price: $950.00 Click For Bigger View Original Sketch by Artist Mark Tumber of Bob Dylan. Click For Bigger View Original Sketch by Artist Mark Tumber of Mick Jagger.