Here also was a dim light that permitted him to see another corridor at the opposite side; so he crossed the rocky floor of the cavern and entered a second corridor.

This one twisted and turned in every direction but was not very long, so soon the boy reached a second cavern, not so large as the first.

This he found vacant also, but it had another corridor leading out of it, so Inga entered that.

It was straight and short and beyond was a third cavern, which differed little from the others except that it had a strong iron grating at one side of it.
All three of these caverns had been roughly hewn from the rock and it seemed they had never been put to use, as had all the other caverns of the nomes he had visited.

Standing in the third cavern, Inga saw what he thought was still another corridor at its farther side, so he walked toward it.