Page "Stig of the Dump" Paragraph 5

We know that Stig is a caveman, and really Barney hardly seems to give any thought to where Stig has come from until the end of the book.

Then, during a very hot, sultry mid-summer's night, when Barney and his sister Lou can't sleep, they find themselves transported back in time and out onto the downs.

To their surprise, they meet Stig, back with his own people, engaged in the construction of four gigantic standing stones.

They spend a magical night camping out with the people of Stig's tribe, and helping to shift the final stone into position before sunrise.