Mysteries and controversies swirl, but the official story is that the wall map was created in 1507 by Martin Waldseemüller, known about from references in other works, then discovered by accident in 1901. It is said to be the first map showing the new world, which Waldseemüller chose to call America rather than Columbia. American cartographic historian Schwartz discusses its origins, physical properties, provenance, loss and discovery, publication, and recent acquisition by the Library of Congress. Annotation ©2008 Book News, Inc., Portland, OR (booknews.com)