The Navajo family system is matrilinear, so that when a man marries, he goes to live with his wife and her parents. Originally a nomadic people, the Navajo tended to travel together in small bands of families. They first made their living as hunter-gath erers, sometimes raiding the Pueblo Indian villages for food and property. Through contact with the Pueblos, the Navajo learned farming, in addition to arts and crafts such as basketry, pottery, and sand painting. They acquired sheep and goats from the Spanish in the 1600's, soon becoming the master weavers they are today. Each Navajo family supported itself through these various activities, living together in the hogan, a round log structure covered with bark or adobe.