Although the cavern was referred to as "Glimmersea station" there is no evidence of any other living beings in this large grotto other than yourselves. (Hajih mentiones that it is always possible that a kuo-toa or cloaker enclave lies nearby. It wouldn't look like an obvious "village" but would be potentially dangerous nonetheless. You decide to move on as quickly as possible.)

Your waterskins are full, and it looks like there is enough for about a day and a half (if everyone shares). Hajih warns everyone to be careful about drinking the stream water. You never know whether it's safe or not, and you wouldn't want to catch a disease or anything. (Everyone looks at Aeroz for a moment.)

You form up in loose marching order, staying fairly close to each other. Even for those of you with low-light vision, there is something comforting about being close to the everburning torches. The surrounding darkness is almost palpable.

Following the stream away from the waterfall pool, you see that the water trickles toward a dark passageway exiting the cavern. Since water flows downhill, Hajih predicts that the stream might lead you to the Glimmersea. The passage appears to be wide and easily navigable (at this point at least). As you head into the passage, the roar of the waterfalls fades to a dull rumble, then to a whisper, then to silence.

Soon you are enveloped in a silence as thick as the darkness, broken only by your footfalls and the occasional spash as someone steps in the shallow stream. As you hike deeper and deeper into the Underdark, the dark trickle of water under your feet serves as your only "map."

...

After what seems like hours you decide to break for a meal. (Is this breakfast? lunch? dinner? Who can tell?)

You have arrived at a fork in the passage. The passage flares out here, creating a small "room" 40 ft across where everyone can sit down, rest and eat. The stream runs down to the right, but another dark passageway forks off to the left. The leftward passage looks wider and smoother (and drier). Hajih points to some scrape marks along that pathway, suggesting that someone or something had headed in that direction not too long ago. It is the first sign of another being you've seen so far.

As you munch on some trail rations, you debate whether it's better to continue to follow the stream or whether you should take the passage to the left ...