They had almost reached the gates of the farm when Natalie heard the sharp wail. At first she thought it was the cry of a bird, but as she listened it subsided into a gurgling sob, soft and all too human. She glanced around but could see nothing. At the foot of the slope, her uncle turned his horse and waved impatiently. Natalie held up her hand. She was about to move forward when she heard it again, to her left.