These serial stories could run to hundreds of installments if they were popular. And to pad out a successful series, writers would insert quite extraneous material such as the geography of the country in which the action was occurring, so that the story would extend into more issues. Plagiarism was rife, with magazines profiting from competitors' successes under a few cosmetic name changes. Apart from action and historical stories, there was also a fashion for horror and the supernatural, with epics like "Varney the Vampire" running for years. Horror, in particular, contributed to the epithet "penny dreadful". Stories featuring criminals such as 'Spring-Heeled Jack', pirates, highwaymen (especially Dick Turpin), and detectives (including Sexton Blake) dominated decades of the Victorian and early 20th-century weeklies.