Indonesian trade with northern Australian aborigines

 

article: https://www.australiaforeveryone.com.au/files/maritime-muslims.html

'Makassar people from the region of Sulawesi in Indonesia began visiting the coast of northern Australia sometime around the middle of the 18th century, first in the Kimberley region, and some decades later in Arnhem Land. They were men who collected and processed trepang (also known as sea cucumber), a marine invertebrate prized for its culinary value generally and for its supposed medicinal properties in Chinese markets. The term Makassan (or Macassan) is generally used to apply to all the trepangers who came to Australia.'
- https://en.wikipedia.org/wiki/Makassan_contact_with_Australia