text:  We therefore do exhort them to go on to give a taste for painters' etchings to improve themselves too; and let each make it a rule to himself never to take the trouble to touch a subject that is not worth doing; nor to tell a story not worth telling however such may seem to look pretty or with effect upon copper or paper; by all means to avoid "annual sentimentalities " and commonplace "acting charades;" and never to forget that expression is the soul of the art