Keywords: HarfieldTredgold.jpg File The Anti-Slavery Society Convention 1840 by Benjamin Robert Haydon jpg John Harfield Tredgold Chemist He was va leading liberal in w Cape Town He attended the international anti-slavery convention in London England Note this is an extract from a much larger painting <nowiki><ref name npg>http //www npg org uk/live/search/portrait asp LinkID mp00224 rNo 0 role sit The Anti-Slavery Society Convention 1840 Benjamin Robert Haydon accessed 19 July 2008</ref></nowiki> http //www npg org uk/live/search/portrait asp LinkID mp00069 rNo 0 role sit Creator Benjamin Robert Haydon 1841 PD-old-100 DEFAULTSORT Tredgold John Harfield Benjamin Robert Haydon John Harfield Tredgold Abolitionism Abolitionists People of London |