what might be upon the floor of the cavern, but our grating lay in a depression whose rim hid all this from our eyes. Our foiled attention then fell back upon the suggestion of the various sounds we heard, and presently my eye caught a number of faint shadows that played across the dim roof far overhead.
Indisputably there were several Selenites, perhaps a considerable number, in this space, for we could hear the noises of their intercourse, and faint sounds that I identified as their footfalls. There was also a succession of regularly repeated sounds—chid, chid, chid—which began and ceased, suggestive of a knife or spade hacking at some soft substance. Then came a clank as if of chains, a whistle and a rumble as of a truck running over a hollowed place, and then again that chid, chid, chid resumed. The shadows told of shapes that moved quickly and rhythmically, in agreement with that regular sound, and rested when it ceased.
We put our heads close together, and began to discuss these things in noiseless whispers.
"They are occupied," I said, "they are occupied in some way."
"Yes."
"They're not seeking us, or thinking of us."