Stig of the dump
King Clive
Penguin Books
Brney spends a lot of time by himself, and often goes wandering off alone.
One day he is exploring by the edge of an old chalk-pit, when it gives way. Finding himself in some sort of cave, Barney is astonished to discover a 'somebody' living there: somebody with a lot of shaggy hair and two bright black eyes, wearing a rabbit skin and speaking in grunts. Barney names him Stig, and the two quickly become best friends.
Of course nobody believes Barney when he tells his family all about Stig. But Barney doesn't care. He and Stig are far too busy having a brilliant series of unforgettable adventures.