Boston: L. Prang & Co., 1865. [12p]. 11cm. Accordion fold out mounted on wrappers. "Chromolithography was perfected by Louis Prang of Boston in the 1860s. He was the premiere printer of illustrated books. In this accordion-shaped book the robin, bull-frog, fox, and weasel entertain themselves in the forest after the sun goes down and the children are asleep." In the American Treasures of the Library of Congress. Slight soiling of wrappers; otherwise an exceptional copy in very good condition.