Durgan explores deeper, following the only pathway. He listens intently for sounds other than their own footsteps and holds his mace ready as he moves.
"Hmm," Durgan thinks aloud. "No resistance in this room. Ahead should be empty also, but I am just guessing."
Durgan opens the balky found door after checking it.
D12: 9
"Oh! Interesting!," Durgan exclaims. "I didn't notice this from the other side."
He enters the kitchen with the torch and closes the door, attempting to figure out the method by which it opens on the kitchen side. If he fails, he shouts through the wall to Sessativa to open it.
Then he leads them back to the intersection of the corridors, following the path they had not explored.
D20: 7, success!
Opening the secret door, Durgan heads right, through the other door. He follows the corridor to the intersection, and then continues straight, to unexplored territory.