Heart of Darkness and The Complete Congo DiaryOn a boat in the Thames estuary, Marlow tells his travelling companions of his reconnaissance expedition for a Belgian trading company to its most remote outpost in central Africa, which brought him on the trail of the elusive Kurtz, a brilliant idealist gone rogue. His account relates not only the perils he encounters on his quest, but also the deterioration of his state of mind as he is confronted with a world that is hostile and alien to him.