resumed his lecture touring and died in Bath during one of those tours. Personal life Thelwall married twice. He married Susannah Vellum at Oakham in 1797. She died in 1816, leaving him four children to support. In 1837 his second wife, Cecil, wrote a biography on the early life of her husband. Thelwall's eldest son was the clergyman and scholar Algernon Sidney Thelwall and his lesser-known younger son was called John Hampden Thelwall or Hampden Thelwall. Both sons were named after 17th-century republicans. Legacy In the field of politics Thelwall promoted "democratic reform, universal suffrage and freedom of speech". Steve Poole has argued: "Thelwall's was perhaps the most important individual voice in the history of British radicalism... Nobody was better than Thelwall at communicating the Rights of Man to a wide audience." In the field of speech therapy, he was the "first to make speech correction a profession" and the first to write a book on the subject and to establish a school. In the film Pandaemonium (2000), Thelwall was played by Andy Serkis. A restoration project on Thelwall's grave in St Swithin's burial ground in Walcot, Bath was launched in 2006 by the Regional History Centre at University of the West of England (UWE). In October 2009, the Dalhousie University Theatre Department produced the first staging of Thelwall's 1801 melodrama The Fairy of the Lake, as a complement to the John Thelwall conference being hosted at the time by the University's English Department. A blue plaque was erected in 2018 by English Heritage at 40 Bedford Place, Bloomsbury, London, where he lived and worked, 1806–1813. Works Poems on Various Subjects (1787) Incle and Yarico (1787) The Incas (1792) An essay towards a definition of animal vitality (1793) The Peripatetic; or, Sketches of the Heart, of Nature and Society; in a Series of Politico-Sentimental Journals (1793) Poems written in close confinement in the Tower and Newgate (1795) The Natural and Constitutional Right of Britons to Annual Parliaments, Universal Suffrage, and the Freedom of Popular Association (1795) The Tribune (1795–96) The Rights of Nature Against the Usurpations of Establishments (1796) Sober Reflections on the Seditious and Inflammatory Letter of the Rt. Hon. Edmund Burke to a Noble Lord (1796) Poems chiefly written in retirement … with a prefatory memoir of the life of the author (1801) The Fairy of the Lake (1801) The Daughter of Adoption (1801) Selections, and original articles,