The four Walker children—John, Susan, Titty, and Roger—are spending the summer with their mother in the Lake District while their father’s away on duty in the navy. After getting permission to use their accommodation’s dinghy, theSwallow, they also beg to be allowed to camp alone on a nearby island.
With permission granted by their understanding (and trusting) mother, their adventures begin. For one thing, they’re not the first to camp on...