4th journey to the Indies (Java, Bali, Soemba, Timor, Alor)
The First World War forced Nieuwenkamp to stay in the Netherlands for a long time. When, in September 1917, a boat finally did set off to the Indies, he made sure he was on board. This time the trip around the world lasted one and a half years. Because of the war in Europe the route took him through the Panama Canal, via San Francisco, Japan, Hong Kong, Canton and finally to Batavia. Many institutes funded Nieuwenkamp with generous financial resources. And, in part thanks to his book, he was held in great esteem in scientific circles, as a well-respected researcher. He was also commissioned to carry out certain studies and to purchase a number of objects.
On board he became seriously ill, suffering from malaria, various infections and Spanish influenza. In Batavia, he stayed in the Hotel der Nederlanden and managed to book a passage to the Netherlands on board the SS Noordam. On the final page of his travel notes from 1917 to 1919, he wrote:
And there was this famous explorer, very thin and very pale, sitting in the large dining room of the Hotel der Nederlanden, tucked away in a corner out of the draughts, hiding behind a table, unenthusiastically eating his rice pudding.'
Once on board he slowly recovered. He returned home in late January 1919.
He described part of this journey in Wanderings around Dutch Timor, published in 1925. Everything he wrote about this journey is contained in two files, and in the notes from his notebook and diary. Although they were never published, many of these documents are of great cultural and ethnographic interest. After his return, he reworked his writings about his visit to Bali, publishing them in a revised edition of Wanderings around Bali (1922).