According to Timawi, how were the seven remaining members of the Yahi tribe able to survive in the book, Ishi: Last of His Tribe?

Ishi and his family have survived only because Ishi's father taught them how to hide. While other Yahi tried to fight the saldu, Ishi's father taught them to hide in caves, under leaves, and even alongside trails in order to avoid detection. Ishi's father would set up fake camps in order to draw the saldu away from their village.