Chapters 13-15 Summary

In chapter thirteen, Brian attempts to give Derek water, but Derek immediately chokes. This confirms what Brian has feared, that Derek will have to go without water until rescue can come. Brian is unsure how long a person can go without water. Brian begins to search Derek's briefcase for something that might help, but all he finds is the map of the area. On the map, however, is a river.

In chapter fourteen, Brian studies the map and realizes there is a trader's post on the river about a hundred miles away. Brian at first thinks he might go get help and come back for Derek, but then he realizes that Derek would be eaten alive by wild animals. Instead, Brian thinks he should take Derek with him.

In chapter fifteen, Brian begins looking for wood to make a raft out...