When she found the second gateway, she was still not through to the centre. A third wall blocked her. She hurried on, now determined to find out just how many defences this fort possessed.
The third entrance was different from the two previous ones. There were huge lichen-covered blocks of stone half buried in the grass as though some ancient doorway had once been there.
She peered through, not intending to enter, but found this inner ring so different from the outer, she could not resist exploring it. Here the earth walls seemed once to have been lined with enormous, square blocks of stone — most of them now fallen and cluttering the ground, but some still in place. The latter had been shaped with such great skill that there was not a hair’s-breadth of space between them. As the sunligh
