NY: Viking. (1964). Color illus. by the author. Oblong 8vo. 33p. Beige illus. cloth. 2nd prtg. March 1965. Name frt. endpp, else Fine in lt.edgeworn d/j, few 1/4" tears. 
Peter is a little boy who wants to be able to whistle for his dog, the story of his learning is told in lovely simple words and beautiful, glowing pictures by Caldecott medal winner.