Joseph Conrad's diary (hitherto unpublished) of his journey up the valley of the Congo in 1890
in The Blue Peter (London, UK) Vol. 5, no. 43 (Oct 1925): 
pp.317–364, 366
- Subsequently serialized as The Congo Diary in The Yale Review (New Haven, CT, USA) (Jan 1926)
- Collected as The Congo Diary in Last Essays (1926)
View in Internet Archive BookReader (experimental). 
Introduction and notes by Richard Curle.