A trade treaty gave the Dutch command of the spice trade but reserved Johor's rights in tin exports from Perak, Selangor, and Klang.
The spice trade was the most profitable trade at the time.
mnli hypothesis: The spice trade was the most profitable trade at the time. premise: A trade treaty gave the Dutch command of the spice trade but reserved Johor's rights in tin exports from Perak, Selangor, and Klang.