The Rassam cylinder, named after its discoverer, Hormuzd Rassam, contains reports of Sennacherib’s first three campaigns. Though known for over a century, it has only recently been fully treated in Eckart Frahm, “Einleitung in die Sanherib-Inschriften,” Beihefte zur Archiv für Orientforschung 26 (1997), pp. 51–61.