With acknowledgement and apologies to Michael Moorcock...
The PCs begin still in the Bone Man's tower. They can see, in the distance, what Debi believes to be the fabled extradimensional city of Scanelorn.
They return to the wall, and to the Troll's Tooth, telling Captain Klang what they have seen and done. Klang and his goblin crew begin to paddle the ship into the passage through the wall.
They manage to get through without incident. Anchoring in the middle of the river, just beyond the wall, they get some sleep.
The next day they proceed to the city. As they near it, they see that then entire city is apparently surrounded by a wide and deep moat, into which they can see other rivers as well as the one they are on, connecting. Rivers from other planes of existence.
They find a place to dock and pay 10gp for a week.
From the boat, they see eople clearly not from their own reality. They hear the common tongue spoken with strange accents. Humans and demi-humans are recognizable but...not quite the same.
The Goblins take shore leave. Debi inquires with the harbormaster, on behalf of the group, to find a good tavern where they might eat and seek information. He suggests the Lucky Traveller and gives her directions.
At the Lucky Traveller, the PCs sit down. Debi chats up the bartender, who invites her to take the stage and entertain the crowd. Simon "blesses" her (rolling again to make contact with the god Ahki while on this plane), and Debi rolls a very high performance roll. She introduces herself and sings a song about the founding of Langwon.
After her set, two strangers approach them at the table. A man going by Samhir the Blue Archer and an albino woman in a black cloak known as Shalla Hess. The PCs all make perception rolls, and notice that the two have familiar accents. The archer and the albino tell them they are also from the Langwonian plane and have been trapped here. They need help to return home, but until now have found no other Langwonians. They explain a rumor that the head of the Thieves Guild has a magic ring that can activate a planar gate located somewhere in the Black Marsh to the north of the city. They tell the PCs where the Thieve's Guild HQ is.
The PCs say they might be interested. They agree to meet again later.
Being a rogue, Mick goes to check out the HQ. Debi and Simon go to the Archives of Scanelorn.
Mick finds a large stone building with no windows - just small slits for light and air. One door on front with two guards. Alleys on either side. In the middle of the Thieves Quarters, an area of confusing, crowded, narrow streets and alleys.
Behind the Guild HQ he finds a tavern. He goes in check it out.
Debi and Simon go to the Archives, where Debi researches lore about both the city, the Planar Gate, and the Bone Man. She rolls a natural 20 on investigation and gets lots of info. It requires the right river, on a magic ship, to sail into Scanelorn. They had neither. That and the "wall" lead her to believe they were sent here for some ill-intent by unusual methods.
In the tavern, Mick encounters two thieves who mess with him a bit. One of them says he should "meet the boss." The other rolls a 20 and picks Mick's pocket, stealing his magic dagger. He then flaunts the dagger to taunt Mick with his skill, then gives it back to him. Mick leaves, after using an invisible Mage hand to pull the hood down in the face of his pickpocket.
That night they return to the Lucky Traveller, where Debi performs for tips. The meet up with Shalla Hess and Samhir the Blue Archer to scheme. After a long discussion they decide to go to the scummy tavern behind the Thieve's Guild and try to kidnap a thief to question. They agree to try to knock one out, take him back to the Troll's Tooth, and Debi will use her Detect Thought's spell to get info about the interior of the Thieve's Guild and the Master Thief. All they know about him is that he rarely leaves the building, and is a portly but nimble fellow.
They go to the tavern. Samhir and Shalla Hess get on a nearby rooftop to act as snipers if needed. Simon casts pass without track to enhance everyone's stealth who is near him.
Mick goes in, using Alter Self to change his appearance.
He sees a thief walk out to relieve himself in the alley. Mick sneaks after him, and knocks him out. The PCs her Shalla Hess and Samhir chuckling from the rooftop.
They blindfold the man, put him in the portable hole, and make quickly for the Troll's Tooth, needing to reach the ship before the man runs out of air in the hole.
End of Session.