Old St. Paul's is a novel by William Harrison Ainsworth. It is a historical romance that describes the events of the Great Plague of London and the Great Fire of London. The story of Old St. Paul's is spread over six books that range between April 1665 and September 1666 and details the events of the grocer Stephen Bloundel's life. Part of the story deals with the pursuit of Leonard Holt, the grocer's apprentice, in love with his master's daughter while she pursues Maurice Wyvil. This happens while a plague hits London, and St Paul's Cathedral is turned into a place to house the sick. During the plague, London is filled with the ill while many characters, including Anselm Chowles and Mother Malmaynes, go around killing and robbing the sick. Bloundel seals his house to avoid the plague. While this happens, Holt wanders alone in London and catches the plague, and Amabel Bloundel goes to marry Wyvil.