The shadows were lengthening now. I could see the sun slowly creeping down behind a mountain. In a few minutes the whole valley would be in shade. I shivered and looked round nervously, trying not to think of the prospect of spending a night on this desolate mountain. As I turned to look behind me a sharp pain shot up through my leg like an electric shock. I winced. I knew there was no way I could go anywhere. Even if my leg was fine, which it obviously wasn't, it would be dark soon. It would be better to stay where I am and wait to be rescued. How long had I been here already? It felt li…