[Leis] once related his strategy for dealing with importunate painters. When they insisted on his coming to examine their work. He said his method was to stalk into their studio and to stand in front of their canvases with his feet well apart. After a minute or two of silent inspection, he would turn and leave the studio without comment. If captured again by the same painter and made to return for a second look, he would once more stand feet apart, and after a bit, draw his breath in sharply and make a low whistle. Then turn and leave once more. He recommended this procedure to all those pestered by painters and said that it was recognized professional protocol for the serious critic.
A nonverbal art required a nonverbal comment.