Question: Where in the Dutch East Indies did Sandy Wollaston collect the haplotype on the Setakwa River?

Context paragraphs:
Jan Pieterszoon Coen: Jan Pieterszoon Coen (8 January 1587 – 21 September 1629) was an officer of the Dutch East India Company in Indonesia (VOC) in the early seventeenth century, holding two terms as its Governor-General of the Dutch East Indies.  He was the founder of Batavia, the capital city of the Dutch East Indies.

Pieter Gerardus van Overstraten: Pieter Gerardus van Overstraten (19 February 1755, Bergen op Zoom – 22 August 1801, Batavia) was Governor-General of the Dutch East Indies from 1796 until 1801.  He was the last Governor-General of the Dutch East India Company, which was dissolved, bankrupt in 1799, but he remained in post as the Dutch state took over ruling its territories in the Indies.  In that sense, he was also the first state appointed Governor-General of the Dutch East Indies.

Highland tree frog: The Highland treefrog or Wollaston's treefrog ("Litoria wollastoni"), is a species of frog in the Hylidae family, found in West New Guinea.  Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical moist montane forests, rivers, rural gardens, and heavily degraded former forests.  It was named in honour of the British naturalist and explorer Sandy Wollaston, who collected the holotype on the Setakwa River, southern Netherlands New Guinea in 1912-1913.  The holotype is housed in the Natural History Museum, London, accession number BMNH 1947.2.23.59.

Dutch East Indies campaign: The Dutch East Indies Campaign of 1941–42 was the conquest of the Dutch East Indies (present-day Indonesia) by forces from the Empire of Japan in the early days of the Pacific Campaign of World War II.  Forces from the Allies attempted unsuccessfully to defend the islands.  The East Indies were targeted by the Japanese for their rich oil resources which would become a vital asset during the war.  The campaign and subsequent three and a half year Japanese occupation was also a major factor in the end of Dutch colonial rule in the region.

Dutch Indies literature: Dutch Indies literature or Dutch East Indies literature (Dutch: Indische letteren or Nederlands Indische literatuur, Indonesia: Sastra Hindia Belanda.)  is a section of Dutch literature encompassing Dutch language literature inspired by colonial and post-colonial Insulinde from the Dutch Golden Age to the present day.  It includes Dutch, Indo-European and Indonesian authors.  Its subject matter thematically revolves around the VOC and Dutch East Indies era, but also includes the postcolonial discourse.

Indies Empire style: Indies Empire style (Dutch "Indische Empire stijl") is an architectural style that flourished in the colonial Dutch East Indies (now Indonesia) between the middle of the 18th century and the end of the 19th century.  The style is an imitation of neoclassical Empire Style which was popular in mid-19th-century France.  Conformed to the tropical setting of Indonesia, the style became known in the Dutch East Indies as Indies Empire style.

Khouw Kim An: Khouw Kim An, 5th Majoor der Chinezen (; 1875-1945) was a high-ranking Chinese Indonesian bureaucrat, public figure and landlord who served as the last "Majoor der Chinezen" ("Major of the Chinese") of Batavia, Dutch East Indies (now Jakarta).  The Chinese Mayoralty was the highest-ranking, Chinese government position in the East Indies with considerable political and judicial jurisdiction over the colony's Chinese subjects.  The Batavian Mayoralty was one of the oldest public institutions in the Dutch colonial empire, perhaps second only in antiquity to the viceregal post of Governor-General of the Dutch East Indies.

Beb Vuyk: Elizabeth (Beb) Vuyk (born Rotterdam, February 11, 1905 – died Blaricum, August 24, 1991) was a Dutch writer of Indo (Eurasian) descent.  Her Indo father was born in the Dutch East Indies and had a mother from Madura, but was ‘repatriated’ to the Netherlands on a very young age.  She married into a typically Calvinist Dutch family and lived in the port city of Rotterdam.  Vuyk grew up in the Netherlands and went to her father’s land of birth in 1929 at the age of 24.  3 years later she married Fernand de Willigen, a native born Indo (Dutch father and Ambonese mother) that worked in the oil and tea plantations throughout the Indies.  They had 2 sons, both born in the Dutch East Indies.

Netherlands New Guinea: Netherlands New Guinea (Dutch: "Nederlands-Nieuw-Guinea" ) refers to the Papua region of Indonesia while it was an overseas territory of the Kingdom of the Netherlands from 1949 to 1962.  Until 1949 it was a part of the Dutch East Indies.  It was commonly known as Dutch New Guinea.  It contained what are now Indonesia's two easternmost provinces, Papua and West Papua (administered under a unified government prior to 2003 under the name "Irian Jaya").

Royal Netherlands East Indies Army: The Royal Netherlands East Indies Army ("Koninklijk Nederlands Indisch Leger"; KNIL) was the military force maintained by the Netherlands in its colony of the Netherlands East Indies (also known as the Dutch East Indies), in areas that are now part of Indonesia.  The KNIL's air arm was the Royal Netherlands East Indies Army Air Force.  Elements of the Royal Netherlands Navy were also stationed in the Netherlands East Indies.

Supporting paragraphs: Highland tree frog Netherlands New Guinea
Answer: Netherlands New Guinea