illustration from Moby Dick 1930
The Philadelphia Museum is currently showing Rockwell Kent - Voyager: An Artist’s Journey in Prints, Drawings, and Illustrated Books. Through July 29, 2012. The show is organized by Kent's longtime friend Carl Zigrosser, the founding curator of the museum's department of prints and drawings. The show includes a range of work, including woodcuts, pen and ink drawings, pencil sketches, lithography (a self-portrait with the stone that made the print is fascinating) and watercolors.
http://www.philamuseum.org/exhibitions/760.html