Mary also set in motion currency reform to counteract the dramatic devaluation of the currency that characterized the last few years of Henry III's reign and the reign of Edward VI (somebody please check number). Mary's deep religious convictions also inspired her to institue social reforms, although these were largely unsuccessful. She was deeply unpopular, but did not last long on the throne being succeeded by her younger sister Elizabeth I, who quickly undid most of Mary's changes. Marian apologists have pointed out that fewer Protestants died under Mary than Catholics under Elizabeth, but admit that, averaged over a length of reign, the Marian death toll was indeed higher. Her restoration of Catholicism was remarkably successful in one ways; where only one bishop - [John Fisher]? of Rochester - had resisted Henry's changes to the point that Henry had him executed, most of Mary's bishops refused to conform to the restored Protestantism under Elizabeth I and died under house arrest.