Kate Beaton (born 8 September 1983) is a Canadian comics artist, and creator of the comic strip Hark! A Vagrant.
Source: Wikipedia, "Kate Beaton", available under the CC-BY-SA License.
From the Artist Biographies in To Be Or Not To Be:
Kate Beaton draws pictures of historical people making silly faces for a living. Ryan North has taught her how to be a true friend, a true hero, and the importance of blasting her quads in a mega workout. The last one is the most important.
Her work can be found, somewhat irregularly, at http://www.harkavagrant.com/