Eleanor Morton, author of "Josiah White - Prince of Pioneers," will autograph copies of her book in the Windsor Store, Mauch Chunk, when the copies go on sale today. The authoress, Mrs. Elizabeth Gertrude Stern, writes under the pen name of Eleanor Morton. She devoted the past two and a half years in research to the book, which is dedication to the people of Lehigh and Panther Valleys. Josiah White was the founder of Mauch Chunk.