Billie will, with support from the others, move to the front of the line; keeping her crossbow at the ready at all times, she does her best to spot anything odd or out of place while attempting to keep the coughing down.
Rowan resumes his vigil at the rear of the group, keeping an eye out especially for any sounds of movement back from the way we came. He draws out his mace, loosely holding that in his left hand with his billhook held in his right; as the tunnel grows deeper, he is prepared for it to also get narrower, and whichever weapon he uses he will readily drop the other.
Dollin keeps his place near the center of the group, his fingers nervously twitching towards his fire syphon.