Sentence:  According to the American historian Henry Adams, who first came to Tahiti in 1891 and recorded the memories of the elderly female chief Arii Taimai: Tavi's direct and full authority extended only over his own <WSD>chiefery</WSD> of Tautira, but by rank or courtesy, through his family connection or his influence, it extende over the whole island, and only Eimeo or Moorea was exempt. 
Meaning of the word marked with <WSD> tags:  The land ruled over by a chief; chieftainship.