Joseph Ketley attended the Anti-Slavery Convention, organized by Anti-Slavery International (the world's oldest international human rights organisation), in London in 1840.
Joseph Ketley (1802-1875) was a mid-nineteenth century Congregational missionary and abolitionist in Guyana, the former British colony of British Guiana which was known as Demerara and Essequibo at the time when his mission was established. On 12 July 1840 he attended the Anti-Slavery Convention in London. Anti-Slavery International, founded as the British and Foreign Anti-Slavery Society in 1839, is an international non-governmental organisation, registered charity and advocacy group, based in the United Kingdom. It is the world's oldest international human rights organisation, and works exclusively against slavery and related abuses. Anti-Slavery International Anti-Slavery Today's fight for tomorrow's freedom 1839; 181 years ago (1839) Anti-slavery London, SW9
United Kingdom International 
