"Tyler came out of her reverie, disquieted. She focused her attention, but the only presence with her was the wind. Still her thoughts had momentarily felt alien to her. Tyler sighed. It was time to go back to the hotel. She stood up. She shifted her weight as she prepared to walk away. She froze. With a chill of apprehension, Tyler realized someone was near, someone who could not be a conventional perceiver. Someone who had screened their presence...