Over the years , beginning in 1929, Mason has been awarded seventeen major prizes including two gold medals ; two Ranger Fund purchase awards; theJoseph Pennell Memorial Medal; two American Watercolor Society prizes; theBlair Purchase Prize for watercolor , Art Institute of Chicago ; and others in Buffalo , New York , Chautauqua , New Haven , Rochester , Rockport , and most recently, the $ 300 prize for a watercolor at the Laguna Beach Art Association ,