This may have been done unwittingly, since he was illiterate and may not have realized that the British intended to take permanent possession of the territory. Some of his later actions indicate that he was happy with the presence of the colony in his territory.
It is possible that he did this unknowingly, since he was illiterate and may not have realized that the British planned to permanently occupy the territory.  Some of his subsequent actions indicate that he was pleased with the colony's presence on his land.