admired is the realism—even with an approximation to trompel’œil—and the difficulty, real or supposed, of producing it. But all these comments, and nearly all attention to the picture, cease soon after it has been bought. It soon dies for its owners; becomes like the once-read novel for the corresponding class of reader. It has been used and its work is done. This attitude, which was once my own, might almost be defined as ‘using’ pictures. While you retain this attitude you treat the picture—or