Chapter 26 She was ready, crouched close to the window of her room, when the signal came, but first she was not sure, because the sound was as faint as a memory. Moreover, it might have been a freakish whistling in the wind, which rose stronger and stronger. It had piled the thunder-clouds higher and higher, and now and again a heavy drop of rain tapped at her window like a thrown pebble. So she waited, and at last heard the whistle a second time, unmistakably clear. In a moment she was hurrying down to the stable, climbed into the saddle, and rode at a cautious trot out among the sand-hills. For a time she saw no one, and commenced to fear that the whole thing had been a gruesomely real, practical jest. So she stopped her horse and imitated the signal whistle as well as she c