Map of the world coloured to show the status of the sugar-growing countries, and with narration arguing that the retention of colonial slavery increases the price of sugar in Britain. The map has the caption: ‘Chart of the World, on Mercator’s projection. Illustrative of the impolicy of slavery’.

The work is a plate from Thomas Clarkson, 'The history of the rise, progress and accomplishment of the abolition of the African slave-trade by the British Parliament' (J. W. Parker, London, 1839).