Owen tears off a small piece of parchment, which he pulls out of a map case, and lights it off of the hooded lantern he has been carrying. He walks over to the blue lantern with it, and within moments it is burning brightly. Even though the blue lantern does not feel like it's full of oil, the wick's flame is steady and strong. He waits to see if anything strange or magical happens. When it doesn't, he starts wondering how he is going to make it up the chain.
He puts his own lantern down and coils the rope Gregor has handed him around his body. The giant man folds his hands together at hip height and bends into this knees a bit to make it easier on his shorter friend. Owen uses the boost and grabs on to the chain above the lantern. He hangs there for a moment, trying to ascertain if the chain will hold his weight. When he is satisfied that it will not collapse, he begins to climb. Due to the fact that the links are fairly large, there are plenty of hand holds and he is able to reach the top without much difficulty. The lantern chain is attached to a large bolt in the masonry ceiling here.
Once at the top he sees the passage before him, stretching off into the darkness towards the northeast. It looks to be about ten feet wide and 12 feet in height. The only light comes from the lanterns below, and he can barely see six feet into this corridor.
Holding on tightly to the top of the chain with his arms, Owen swings his legs and torso over to the edge of the passage, barely catching the end with his right foot. After a few tenuous moments, he manages to shift his weight completely away from the chain, until he is finally able to let go of it.