He darted after them like a greyhound.
When he reached the corner and looked cautiously round, he saw them again at some distance down another long passage.

None of the galleries he saw that night bore signs of the work of man--or of goblin either.

Stalactites, far older than the mines, hung from their roofs; and their floors were rough with boulders and large round stones, showing that there water must have once run.

He waited again at this corner till they had disappeared round the next, and so followed them a long way through one passage after another.

The passages grew more and more lofty, and were more and more covered in the roof with shining stalactites.
It was a strange enough procession which he followed.