Marius's grip on Cosette's hand tightened just a fraction, and he took a step closer to her. He peered through the opening of the door, trying to assess what's inside, but in the dim lighting he could only see angular shadows.

"Is it a building, perhaps?" But he knows well enough that they do not have any other choice. He holds his breath and takes a step forward, taking care to position Cosette slightly behind him, in case someone was waiting to attack them behind the doors.