You find another one of the yellow markings leading you down the path to the right.  Then another.  After about 5 more minutes you are coming up to another 3-way intersection, larger this time, a round room with a platform in the middle.  It leads to the north and south.  Along the west wall there is a door.  From where you stand you can also see to the right of the door a small arrow slit, about 6" wide and 18" high, built into the wall.

Unless stopped, Dori would simply walk toward the door with a free hand extended to begin knocking. 

Sizan Sidrosin

Sizan immediately goes to grab Dori's forearm the moment he goes to raise it. With his other hand, he puts his finger to his lip, and gives a warning glare. "Shh. For Gods sake. Quiet." He whispers tersely before investigating the door for any immediate alarms, then quietly tries to open it if allowed to. If he can get it open even a crack, he motions for the torch bearer to back-up. Enough to where the light would be dim filtering in past the door before attempting to sneak ahead. 

Investigation: 21.

Stealth: 6. (Pretty sure the hour is up on Blessings of the Trickster. But if Sariel would/can give it again, the advantage roll is in the spoiler)

Sariel Phyll

Sariel bringing up the rear, sees Dori about knock. He smiles and says quietly at Sizan's comment, "At least its an improvement from beating down a door." He pats Dori on the back. He takes the time to see if there are any fresh tracks around the round room.

Investigation 20

Gargan

For now Gargan is content to allow the newcomer take the lead, though he watches him carefully not ready to trust just yet. He keeps a tight grip on his staff and makes sure his robes are tight around himself making sure to be prepared for the unexpected and keeping to the rear of the group. He makes sure to glance back around the other tunnels every now and then in case of anyone approaching from behind.

Ok I need stealth from everyone please

Stealth: 5

(Just how I like it) 

Gargan

Stealth:12

[Stealth: 5]

Cloudfur taps on Sizan's shoulder "Whatcha lookin' for?" 

Not being the most subtle of the adventurers you've known, Dori clangs up in his armour and despite efforts and warnings to prevent him from doing so, raps loudly on the door.

About 10 seconds later two arrows come shooting out - one from the slit you saw, and the other from an identical one on the opposite side of the circle.  One strikes Dori for 8, the second sails towards Sariel but he manages to turn in time such that it just glances off the armour on his shoulder.

Initiative:

Sariel 6

Dori 9

Sizan 21

Gargan 1

Cloudfur 11

Sariel, Sizan, Gargan, goblins.  Only ranged attacks are viable and they have 3/4 cover.

Also you did push on the door and it swung open, so it wasn't locked .. 

(How far away is the slit near the door?)

(The doors open? I don't care about the slit anymore 😋)

Sizan Sidrosin

 "Them." Sizan states flatly after hearing Dori's grunt of pain. "I need only one." He states, and on that note carries on through the door. Upon getting a visual on the other side rushes along whatever path is ahead to stay out of sight... unless there are immediate enemies on the other side. In which case, he has a short sword with their belly's name on it in bold. 

(OOC - no worries, figured I crit failed my stealth so I played it up hehe)

The room is round and about 15' in diameter.  The arrow slit is probably 5' from the door and the other almost directly across the way.

(I'm dead last, so I'll wait. )

Sizan Sidrosin

Sizan heads on to the next door quietly with any remaining movement, short sword drawn, and holds it up defensively (Dodge) in preparedness for someone breaking through the next door.

(Where is Sizan going? )

Well he's gone into the room behind the door which will be unveiled once we've heard from Sariel and Gargan ;-)