"Then let's get under way at once," suggested Mr. Roumann. "We have
lost enough time as it is. Hurry inside, boys, and we'll start."

The two chums were glad enough to do so, and in a few minutes they were
again moving through the air toward the unknown portion of the moon.

Below the travellers, as they could see by looking down through a
plate-glass window in the floor of the projectile, were the same rugged
peaks, the same large and small craters that had marked the surface of
the moon from the time they had first had a glimpse of it. There was an
uninteresting monotony about it, unrelieved by any save the very
sparest vegetation.

"I am beginning to think more and more that we will find people on the
other side of this globe," remarked Mr. Roumann, as he made an
observation through a telescope.

"What strengthens your belief?" inquired Mr. Henderson.

"The fact that the vegetation is growing thicker. There are many more
plants below us now than there were before. This part of the moon is
better able to support life than the portion we have just come from."

This seemed to be so, but they were still some distance from the
opposite side of the moon.

"I don't see anything of those diamonds you talked so much about,
Jack," said Mark, with a smile, a little later. "I guess all the
Reonaris you get you can put in a hollow tooth."