Smith was incredulous. "Do you mean to say that those little glass pews have been in use all that time?"
Estra nodded, smiling gently at the engineer's amazement. "Like everything else, they were built to last. You must remember that we do not have anything like an 'investment,' here; we do not have to consider the question of 'getting our capital back.' So, if any further improvements were to be made, they also would be done in a permanent fashion."
Billie gave an exclamation of bewilderment. "I don't understand! You say that nothing new has been built, or even replaced, for centuries. How do you take care of your increase in population?" thinking of the great crowd that had just left.
Myrin was the one who answered this. As she did so, she got slowly to her feet; and speaking with the utmost care, watched to be sure that the four understood her:
"Ever since the roof was put on, our increase of population has been exactly balanced by our death rate!"
The four followed their guides in silence as they led the way into the plaza. Now, the space was alive with Venusians. The little cages were everywhere floating about in the air; some of the people were laboriously shifting themselves into their aircraft; others were guiding their "pews" direct to nearby houses. The visitors got plenty of curious stares from these quiet miracle-workers, who seemed vastly more at home in the air than on the ground. "As thick as flies," Van Emmon commented.
Estra and Myrin, walking very slowly, took them to a side street, where two of the cigar-shaped cars were standing. Billie and Smith got in with Estra, while Van Emmon and the doctor were given seats beside the Venusian woman. The two cars were connected by telephone, so that in effect the two parties were one.
By this time, the visitors had become so accustomed to the transparent material that they felt no uneasiness as the ground receded below them. Smith, especially, was tremendously impressed with Estra's declaration that the glass was, except for appearance, nothing more nor less than an extremely strong, steel alloy.
Propelled by the unexplained forces which the two drivers controlled by means of buttons in black cases, the two cars began to thread their way through the great roof-columns; and as they proceeded, the four grew more and more amazed at the great extent of the city. For miles upon miles that heterogeneous collection of buildings stretched, unbroken and without system, until the eye tired of trying to make out the limits of it.
"What is the name of this city?" asked Billie, secretly hoping that it might bear some resemblance to "New York." It struck her fancy to assume that this supermetropolis represented what Gotham, in time, might become.