When he spoke again it was to confess, "After all, they are more human than we had a right to expect. I supposeTemplate:Longdash"
He stopped irritatingly.
"Yes?"
"I suppose, anyhow—on any planet where there is an intelligent animal—it will carry its brain case upward, and have hands, and walk erect . . ."
Presently he broke away in another direction.
"We are some way in," he said. "I mean—perhaps a couple of thousand feet or more."
"Why?"
"It's cooler. And our voices are so much louder. That faded quality—it has altogether gone. And the feeling in one's ears and throat."
I had not noted that, but I did now.
"The air is denser. We must be some depth—a mile even, we may be—inside the moon."
"We never thought of a world inside the moon."
"No."
"How could we?"
"We might have done. Only— One gets into habits of mind."
He thought for a time.