Fergus:

Smiling at Jorzu’s concern, Fergus says, “I will be careful.”

Climbing down to the level of the Ashenwrights, Fergus puts down the jar and climbs back up.  He calls down, “Your captain claims his spirit resides in that jar.  It appears to be a puzzle to open, but I am sure given time you will figure it out.”

He watches intently from above, now back with Jorzu and Laiti.

One of the ashenwights takes the jar from Fergus. A second one approaches to examine it. Together the two dead dwarven miners study the lid of the jar for a long moment, before attempting to carefully turn it. DC 15 Intelligence (Investigation) check: 20

The ceramic jar opens, belching a cloud of heavy vapor which soon condenses and manifests as a stocky dwarf or duergar, albeit translucent. It is dressed not unlike the ashenwights, if their clothes were not in tatters.

"Thank you, strangers," it speaks, audibly. Then it turns toward the ashenwights. "Ay! Brammand, Thordan, Murmiir... What has become of you? How much time has passed?..." He then lapses into Dwarven, speaking with the ashenwight at length, who mutely watch with great interest.

Finally, he turns toward Fergus and Jorzu. "I promised you a reward. I will give you two. First, look for the hidden compartment in the bed frame in the room in which I was imprisoned. Push the panel to open it. Second, examine the north wall in the same room and find the section engraved with four runes. 'Storm,' 'death,' 'light,' and 'wind.' Left to right. The runes must be tapped in the correct order. Left to right: storm, death, light, and wind. Do not tap them in any other order. Take what you think is fair. I must stay with my people. We have much to discuss. I thank you again for my freedom, sincerely. It has been a long time, too long..."

Fergus:

”I am glad we could be of service—it is pleasant to see you reunited with your brothers.  A question for you—did you overhear from Ruxathid in his quarters where they were taking the townspeople?” asks Fergus.

Jorzu 

While waiting fir the spectral dwarf to answer, Jorzu says to Fergus in a hushed way; "Well, that's a pleasant surprise - he doesn't want to eat us or send us to our untimely graves". Followed by;  "Well done young Fergus, I had thought you possessed by some spirit what with the words you were speaking. Turns out your judge of character is more sound than mine" he offers the compliment to his friend before quickly turning his words to the information offered up by Hollowhelm. "I dont speak Dwarvish but I think Quinn does. Hopefully he can confirm the writing on the wall in the bedroom." 

When Fergus indicates he is done with his line of questioning Jorzu join him as they head back to the group. "Are you coming Laiti?"

Fergus:

”Thank you, Jorzu,” replies Fergus, a bit embarrassed, “I very well could have been possessed unbeknownst to me.  I appreciate your concern.”

”Good idea on the runes, too.  Let’s go get treasure after we hear from the good captain what he may have overheard of the chosen one’s plans,” he adds.

"I admit I don’t know much about the goblins' plans," explains Hjoldak. "The goblin leader - this 'Ruxithid' - his stays in that room have become increasingly infrequent. Is he slain or confined now? I've tried to get his attention for years now, to no avail. He could not hear me or perhaps he chose to ignore me. Whenever I saw Ruxithid of late, he always seemed distracted, poring over scraps of paper and then leaving in a manic rush. I know nothing of 'townspeople' I'm afraid. I wish I could be of more help..." 

Unless you have further questions for Hjoldak, Jorzu, Fergus, and Laiti return to the rest of the waiting party upstairs.

Fergus:

”We freed the captain of the Dwarven miners, and he has given us directions to some hidden treasure on this level,” relates Fergus.

Describing the directions to the treasure in detail, he adds, “We do need some help reading the Dwarven runes to get it right, though.”

“If the runes are dwarven, I might be able to help decipher them. Let’s be quick, the townsfolk are ill. They’re outside breathing in the fresh air.”

Quinn checks in with the townsfolk before heading the Ruxithid’s room.

”We’ll be back. Don’t stray away too far from the door. If you see or hear anything, run back in and alert the Sawplee goblins. They’ll help defend this place.”

Quinn heads for Ruxithid’s room and looks to the north wall to find the runes where Fergus says he would find them.

DM: Quinn speaks dwarven, can he interpret the runes and verify the wording? If so do they match the order that words and order that Hjoldak mentioned?

Fergus:

While Quinn does his Dwarven runecraft, Fergus goes to the bedroom and follows the instructions to open the panel in the bed frame.  Gathering what treasure he can find there, he comes over to where Quinn is and shows the rest of the party what he has found.

Perception to find the panel if needed:  16