Then her face sobered suddenly.
"Tao has returned, Alan. And he has sent messengers to our city. They are appealing to our people to join Tao in his great conquest. They say Tao has here with him, on Mercury, a captive earth‑man, with wonderful strength of body, who will help in the destruction of his own world!"
[ CHAPTER XIII.
THE CAPTIVE EARTH‑MAN.]
As we came out of the valley I had my first view of the Great City. It occupied a huge, mound‑shaped circular mountain which rose alone out of the wide plain that spread before me. As far as I could see extended a rich muddy soil partially covered with water. A road led out of the valley, stretching across these wet fields toward the base of the mountain. It was built on an embankment some eight or ten feet high, of the red, metallic ore of the mountains.
All along the base of this embankment, with their roots in the water, graceful trees like palms curved upward over the road. The landscape was dotted with these and other tropical trees; the scene was, indeed, essentially tropical.
I wondered at the continued absence of sight of human beings. The fields were quite evidently under cultivation. A rise of ground off to the left was ridged with terraces. As we passed on along the road I saw a rude form of plow standing where it had been left in a field which evidently was producing rice or something akin to it. Yet there was not a person in sight. Only ahead in the sky I could see a little cluster of black dots that Miela said was a group of females hovering about the summit of the Great City.
"It is the time of sleep now, Alan," she said, in answer to my question.
I had not thought of that. It was broad daylight, but here on Mercury there was no day or night, but always the same half light, as of a cloudy day.
The mountain on which the city was built was dotted thickly with palms, and as we approached I made out the houses of the city, set amid the trees, with broad streets converging at the top. As we came still closer I saw that the summit of the mountain was laid out like some beautiful tropical garden, with a broad, low‑lying palace in its center.