Question: Henri van Gooven's most successful work was the novel Tropenwee, which was similar to a novella by Joseph Conrad, about a voyage up what river?
Sentence (from "Van Breda murders"): After a year and a half of investigations by the South African police, the chief suspect and youngest son Henri van Breda handed himself over to police in June 2016 and was released on bail the next day.
Relevant evidence: No