Alexander von Humboldt, sometimes called 'the last man who knew everything', was an extraordinary polymath of the late 18th and early 19th centuries. In 1798 he received unprecedented permission from the Spanish Crown to explore its American and Caribbean colonies, which he did from 1799-1804. This is the journal of those explorations, in which he extensively covers the region's topography, geology, fauna and flora, anthropology and comparative linguistics. Volume III sees him recording more information on Venezuela, visiting Cuba where he also writes about local politics and speaks out fervently against the slave trade; he then sails for Colombia. The volume ends with a comprehensive geognostic description of the northern part of South America.