I awoke shivering with cold, still tired and hungry. I had no idea where I was but estimated that I was at least three hours from home with no alternative other than to walk back. Solitude felt a lot less appealling. The moon was only shining intermittently now as clouds scudded across the sky. I heard an occasional distant engine and the familiar rush of air being displaced by the passage of a car. By contrast the sounds of the local wildlife were mysterious and immediate. This night was a different creature from those that I knew from late walks through town. A new call began: a high keening that pierced the midnight cacophony like a knife. Probably a fox, I told myself but I was spooked enough to start moving in the opposite direction as best as I could. It came again, closer now and, it seemed, in front of me again. I turned to retrace my steps but my movements were clumsy and ponderous as I stumbled around in the flickering moonlight. The call...