Edward Hopper's early illustrative work is currently exhibited at the Norman Rockwell Museum. I was not aware of Hopper's career in illustration. The earliest of the works were surprising to me. Had I been presented with them and the challenge to identify the artist, I would have never been able to do so. The latest of the illustrations (right before totally devoting himself to painting) are more indicative of his solitary, contemplative scenes. Here is more Information.