"A secret passage," Ken breathes, taking one more glance down. "It's just like in a children's story. All the castles have passages like this, where the nobles sneak away to avoid catastrophe when their fortresses are under seige."
The lieutenant answers the door after a couple more moments. He has thrown on his uniform coat and trousers but is obviously not fully dressed. "A tunnel, you say?" He frowns thoughtfully, glancing up at the towers and making a note of the hour by the position of the stars. "Keep it under wraps for now. I have the off squad busy with setting defenses, they can't be bothered to check this out and your squad needs to remain on the walls. Once the area around the watchtower is full of suitable impediments, the off squad can investigate." He seems either distracted or in a hurry--or just perhaps a bit sleepy--for he doesn't summarize with a crisp order or formally dismiss Marin, but rather closes the door as soon as he has said his piece.