Joseph Ketley, who worked towards the abolition of slavery and promoted Christian teaching amongst the African population and the native Indian tribes of the Essequibo River in the 1830s and 1840s, attended the Anti-Slavery Convention, organized by Anti-Slavery International (the world's oldest international human rights organisation), in London on 12 July 1840.
Joseph Ketley, who worked towards the abolition of slavery and promoted Christian teaching amongst the African population and the native Indian tribes of the Essequibo River in the 1830s and 1840s, attended the Anti-Slavery Convention, organized by Anti-Slavery International (the world's oldest international human rights organisation), in London on 12 July 1840.