CHAPTER XScience Without End
When they had about exhausted the resources of the observatory, they went through the further doorway and so out into the great crumbled expanses of what had once probably been the city’s heart, a heart that had been made up of huge buildings and massive terraces.
“Something occurs to me,” Douglas said thoughtfully, gazing round in the shadowless sunlight. “This city, when it was in full life, could have looked very like those vanishing cities we saw on Venus. The stone is similar—whitish. Dust and age have dimmed it now, of course.”
Vera nodded.
“It is a thought,” she agreed, but she had to drop the subject because she simply had not the knowledge to carry it on.
They began to walk, slowly. Inevitably they covered greater distances than they had intended
