We are observing a group of people trying to find a log. The log is not where they left it. They have been away for some time. Now it is not where it was, and they are perturbed. It is, we gather, a long log. They need it in order to cross a marsh. Finally one of them – he is called Lok – has the bright idea of finding another log, and putting it where the old one was. His companions are deeply impressed by this. A new log is located and moved by communal effort. Now they can cross the marsh to get to where they want to go. They take it in turns to walk along the log, but one of them, an old man, falls into the water. They pull him out, but he is wet and cold, and starts shivering. This seems to trouble them much more than we might expect. We infer that being cold represents a mortal threat.