Deciding to investigate what Forgrim found rather than step into the crypt, we pound some pitons into the wall to anchor a rope to help everyone avoid the pit. Wick offers to go for a swim and investigate the rope in the water. the waterproof satchel he finds attached to the rope appears to have someone's stash of coins and a couple of gems.
Investigating the secret door, Airick takes point with Wick close behind. Forgrim waits by the door while I perch on a barrel and stare down the newly-revealed hall. Upon hearing that there's a natural cavern to investigate, I follow them down the corridor.
A cold breeze fills this large natural cavern, carrying with it the faint scent of decaying flesh. A crevasse divides the cavern and is flanked by two rough stone columns that support the twenty-foot-high ceiling. Two arched wooden bridges span the chasm.
There's a .... thing ... in the cavern speaking telepathically with Airick and Wick, hiding in the shadows behind a column. it's trying to bargain for something in order to let us pass unmolested, but it's wary about revealing itself.
Eventually it disappears down a passage, and Wick takes a look around to the north.
This area is the north end of a large natural cavern, but it has been finished with dressed stone block walls and a flagstone floor. Several barrels are stored against the walls here, along with a number of empty crates, straw for packing, hammers, pry bars, and nails. The cavern continues for some distance to the south. You can make out several passages that open up off the larger cavern, and what looks like a deep pit or crevasse in the floor.
Airick discovers a chest at the north end of the crevasse, and with some help brings it up and into the finished area of the cavern. Wick and I are both unsuccessful at unlocking the chest, so Forgrim pries off the lock.
Inside the chest is the sword Talon, once wielded by the Black Hawk, Aldith Tressendar.
The sword is inscribed with the name "Talon", and its hilt is worked in the shape of a bird of prey with outspread wings. It once belonged to a great knight named Aldith Tresendar, known as the Black Hawk. A character who succeeds on a DC 15 Intelligence (History) check recognizes the sword and recalls this lore. Sir Aldith died fighting off the orcs that attacked through the hidden caverns below his manor
Opening the secret door at the north end of the cavern, Wick unlocks the opposite door we find, revealing an armory. the gear stored here is of standard quality at best, nothing special, so we don't really need any of it.
Proceeding past the armory, Wick and the others open the door at the end of the hall to reveal a familiar room - the crypt we saw before. The skeletons next to the sarcophagi are actually undead and start attacking. With Forgrim's ability to turn undead, they're fairly easy to destroy.