Her muscles having relaxed from their rigid strain of superstitious suspense, Helen reached for the “ammunition sling” that she had placed beside her and drew therefrom one of the catapults they had made in the afternoon, also a pebble about the size of a marble, and fitted the latter in the pocket of the weapon. Then she drew back the pocket and the pebble, stretching the rubber bands as far as she could extend them, and took careful aim.