Regarding the article "John McCarty: A Cultivator of the Unexpected," Sept. 30: I regret that you give a double-page spread to the subhuman and meaningless works of Mr. McCarty, to wit, the fabrications of stone and bent metal.According to eminent art critic Bernard Berenson, to have value, art should be life-enhancing; and bold would be the person who could say that the art of John McCarty, despite all the adjectives spent on him in this article, is in any way life-enhancing. Eugene H. Walker, Concord, Mass. Letters are welcome. Only a selection can be published, subject to condensation, and none acknowledged. Please address them to "Readers Write," One Norway St., Boston, MA 02115.