LLOYD ROBINSON is a pseudonym of novelist Robert Silverberg. Under his own name, Silverberg is the author of many works of popular history, including Empires of the Dust(Chilton, 1963), Akhneton: The Rebel Pharoah (Chilton, 1964), Ghost Towns of the American West (Ohio University Press, 1968), If I Forget Thee, O Jerusalem:Amercan Jews and the State of Israel (Morrow, 1970), The Longest Voyage:Circumnavigation in the Age of Discovery, (Bobbs-Merrill, 1972), The Realm of Prester John (Doubleday, 1972), and The Mound Builders (Ballantine, 1974).