It is one of those things that I could never find out.
Three mattresses, thick and well wadded, spread on the disc forming the false bottom of the Projectile, were arranged in lines whose parallelism was simply perfect.

But Ardan would never think of occupying his until the very last moment.

Walking up and down, with the restless nervousness of a wild beast in a cage, he kept up a continuous fire of talk; at one moment with his friends, at another with the dogs, addressing the latter by the euphonious and suggestive names of Diana and Satellite.
[Illustration: DIANA AND SATELLITE.] "Ho, pets!" he would exclaim as he patted them gently, "you must not forget the noble part you are to play up there.

You must be models of canine deportment.

The eyes of the whole Selenitic world will be upon you.