However, the Anglo-Danish king instead made his son Sveinn a viceroy, in effect placing his mother *lfgifu in charge of his recent conquest. This greatly infuriated Einarr. As the pressure grew more intense on _him_ during Sveinn Knutsson 's viceroy reign, Einar made his greatest political masterstroke. <sep>, Pronoun: him <sep>, A: Sveinn Knutsson <sep>, B: Einar