By 1821, Carlile was a declared atheist (having previously been a Deist) and published his "Address to Men of Science", in favour of materialism and education. In the same year Jane Carlile was in turn sentenced to two years imprisonment for seditious libel, and her place as publisher was taken by Richard Carlile's sister, Mary. Within six months she was imprisoned for the same offence. The process was repeated with eight of his shop workers, including Susannah Wright, and over 150 men and women were sent to prison for selling "The Republican". Carlile's sentence ended in 1823 but he was immediately arrested and returned to prison for not paying his £1,500 fine, so the process continued until he was eventually released on 25 November 1825. In the next edition of "The Republican" he expressed the hope that his long confinement would result in the freedom to publish radical political ideas. An example of the support he received from around the country is the £1.5.1 sent to him in Dorchester jail by forty working men in the West Yorkshire village of Hunslet, accompanied by a noble letter on behalf of those "few Friends to Truth and Justice".