Answer: The Gadsden Purchase, or Treaty, was an agreement between the United States and Mexico, finalized in 1854, in which the United States agreed to pay Mexico $10 million for a 29,670 square mile portion of Mexico that later became part of Arizona and New Mexico.
The talented leader was Squanto who helped the pilgrims with planting corn and told them where to fish and hunt beaver.
Definition:
ethnoarchaeology is the ethnographic study of peoples for archaeological reasons, usually through the study of the material remains of a society.
"Word of mouth" should be your answer. This question has many answers though.