What does Tushi's dream seem to foretell, and how does Ishi respond to her dream?

Tushi continues to dream her White Dream, and she predicts that it foretells her departure from the Yahi lands. She says that each night, she travels further into her dream and she knows that soon she will be with her mother in the White Land. Tushi promises that even though she may go to the Land of the Dead before him, she will meet him on the Trail and go with him to his family's campfire. Ishi is upset by the dream and fears losing Tushi, but he accepts the reality of her vision.