Imperial lives and letters of the eleventh century / translated by Theodor E. Mommsen and Karl F. Morrison; with an historical introduction by Karl F. Morrison; edited by Robert L. Benson. - Conrad II, (Holy Roman Emperor), ca. 990-1039; Henry IV, (Holy Roman Emperor), 1050-1106; Benson, Robert L.; Morrison, Karl F.; Mommsen, Theodor E. (Columbia University Press, 1962)