She always rode Boise.

I'm dead sure he'd bring her out all right." "She hasn't come out--yet.

Go on," said Bud, and Eddie rode forward obediently.
Three hours it took them to search the various passages where Eddie thought it possible that Marian had turned aside.

Bud saw that the trail through was safe as any such trail could be, and he wondered at the nerve and initiative of the girl and the boy who had explored the place and found where certain queer twists and turns would lead.

Afterwards he learned that Marian was twelve and Eddie ten when first they had hidden there from Indians, and they had been five years in finding where every passage led.