A clever Venetian adventurer and scandalous impostor, of the Cagliostro type, who insinuated himself into the good graces for a time of all the distinguished people of the period, including even Frederick the Great, Voltaire, and others; died in Bohemia after endless roamings and wrigglings, leaving, as Carlyle would say, "the smell of brimstone behind him"; wrote a long detailed, brazen-faced account of his career of scoundrelism (1725-1798).