Scope and Content of the Collection From the Collection: Correspondence and telegrams items dating from 1931 to 1975 (bulk 1931 to 1933) from the collection of American writer John M. Weatherwax. This collection provides an important historical detail on one of Diego Rivera’s lesser known projects.The correspondence, involving many people, all of whom were participants in the projected publication of Mr. Weatherwax’s English translation of the Popol Vuh that would include water color paintings by the...