CHAPTER XXIV.

THE WATER CITY. It had stopped raining; the sky overhead was luminous with diffused sunlight; the scene that lay before Mercer was plainly visible. The river had opened abruptly into a broad, shallow, nearly circular lake, some five or six miles across. The country here showed an extraordinary change from that they had passed through. The lake appeared to occupy a depression in the surrounding hills, like the bottom of a huge, shallow bowl. From the water's edge on all sides the ground sloped upward. It was no long…