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?

Context paragraphs:
Royal Military Academy (Belgium): The Royal Military Academy (French: "École royale militaire" , Dutch: "Koninklijke Militaire School" ) is the military university of Belgium.  The school is responsible for the education of the officers of the four components of the Belgian defence (Army, Air Force, Navy, Medical).  The school is located in Brussels in a building constructed by the architects Henri Maquet and Henri Van Dievoet.  The courses are given in French, Dutch and English.

Henri van Booven: Hendrik Cornelis Alexander (Henri) van Booven (17 July 1877 in Haarlem – 31 January 1964 in The Hague) was a Dutch writer and journalist.  His most successful work was the novel Tropenwee (1904) ('Tropical agony'): a thinly veiled autobiographical literary report of a mission to Congo in 1898, somewhat similar to Heart of Darkness.

Henri van der Haert: Henri van der Haert/Hendrik van der Haert/Henri Anne Victoria van der Haert (1790–1846) was a Belgian portrait painter, sculptor, illustrator and engraver.

Henri Van Kerckhove: Henri Van Kerckhove (6 September 1926 – 4 November 1999) was a Belgian road cyclist who won a bronze medal at the 1946 World Championships.  Next year he turned professional and won the Tour of Belgium in 1952 and 1954.  He also rode the 1952 Tour de France and won individual stages of the Tour of Belgium (1948, 1949) and Ronde van Nederland (1949, 1952).  His son Florent Van Kerckhove also became an elite road cyclist.

Amélie van Assche: Amélie van Assche (born 1804 - ?)  was a Belgian painter.  She was born in 1804, and was the daughter of Henri Jean van Assche.  Her sister, Isabelle Catherine van Assche, a landscape painter, was a pupil of her uncle, Henri Van Assche.  Her first teachers were Miss F. Lagarenine and D'Antissier.  She later went to Paris, where she spent some time as a pupil of Millet.  At the opening of the 19th century, the "Art of the Miniature" was cultivated—as expressed at the time—by Hortense van Baerlen, Marie-Josèphe Dargent, and Assche.  She made her debut at Ghent in 1820, and in Brussels in 1821, with watercolors and pastels, and some of her miniatures figured in the various exhibitions at Brussels between 1830 and 1848, and in Ghent between 1835 and 1838.  Her portraits, which are, thought to be very good likenesses, are also admirable in color, drawing, and modelling; and her portrait of Leopold I., which she painted in 1839, won for her the appointment at court.  She was a portrait painter and court painter to Queen Louise Marie of Belgium.

Van Abbemuseum: Van Abbemuseum (] ) is a museum of modern and contemporary art located in central Eindhoven, Netherlands, on the east bank of the Dommel river.  Established in 1936, the Abbe Museum is named after its founder, Henri van Abbe.  Van Abbe was a lover of modern art and wanted to enjoy it there from Eindhoven.  As of 2010, the collection of the museum houses more than 2700 works of art, of which about 1000 are on paper, are 700 paintings, and 1000 are sculptures, installations and video work.

Re-Edition Texts: Heart of Darkness: Re-Editioned Texts: Heart of Darkness is a novel by Stephanie Syjuco, with 12 reproduced versions of Joseph Conrad's novel "Heart of Darkness".  Each version of the novel includes Joseph Conrad's "Heart of Darkness" opened in different online sources and printed without any changes.  Each version is unique to the other 11.  Differences include Font size, Font type, advertisements, and even mistakes.

Under Western Eyes (novel): Under Western Eyes (1911) is a novel by Joseph Conrad.  The novel takes place in St. Petersburg, Russia, and Geneva, Switzerland, and is viewed as Conrad's response to the themes explored in "Crime and Punishment"; Conrad was reputed to have detested Dostoevsky.  It is also, some say, Conrad's response to his own early life; his father was a famous revolutionary imprisoned by the Russians, but, instead of following in his father's footsteps, at the age of sixteen Conrad left his native land forever.  Indeed, while writing "Under Western Eyes", Conrad suffered a weeks-long breakdown during which he conversed with the novel's characters in Polish.

Heart of Darkness: Heart of Darkness (1899) is a novella by Polish-British novelist Joseph Conrad, about a voyage up the Congo River into the Congo Free State, in the heart of Africa, by the story's narrator Charles Marlow.  Marlow tells his story to friends aboard a boat anchored on the River Thames, London, England.  This setting provides the frame for Marlow's story of his obsession with the ivory trader Kurtz, which enables Conrad to create a parallel between London and Africa as places of darkness.

Van Breda murders: The Van Breda murders were the killing of three family members and serious injuring of another on January 27, 2015, at a golf estate in Stellenbosch, South Africa.  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.  The case has polarized the country's media and gained significant attention since Henri's surrender.

Supporting paragraphs: Henri van Booven Heart of Darkness
Answer: Congo River