Sentence:  This Valley belonged in very ancient times to the <WSD>Eleutherians</WSD>; who being subjećt to those of Thebes, out of an inveterated hatred and emulation revolted from them and join'd themselves to the Athenians, as was pretended out of a great fancy and good affection they took to their way of Government. 
Meaning of the word marked with <WSD> tags:  One of a people of Ancient Greece, originally associated with Thebes but later granted rights with Athens.