Older-stock Americans...professed to believe that in due time the "alien riffraff" would "establish" the Catholic church at the expense of Protestantism and would introduce "popish idols." The noisier American "nativists" rallied for political action. () They promoted a lurid literature of exposure, much of it pure fiction. The authors, sometimes posing as escaped nuns, described the shocking sins they imagined the cloisters concealed, including the secret burial of babies. One of these sensational books – Maria Monk's ''Awful Disclosures'' (1836) – sold over 300,000 copies.