human
You have seen the creatures--word of your adventure with them precipitated our misfortune, I might say here--and you know of their tunnels. We were taken down one of these tunnels, and into a still larger one. This in turn gave onto a veritable subterranean avenue, and, in time, led to a sort of underground metropolis.
gpt
What? growled Correy.
human
An underground city of those things?