Small openings... arrows? He draws up short. If the passage was flooded for a long time, any wood would have rotted away, right? Orcelito considers the shape of the tunnel again. While the aqueducts in his home were built long before he was born, he's seen enough of them to make educated guesses.

“We don't know for certain that the flooding was accidental... or that there isn't more water above us.” This is precisely why the Curti Center ought to have provided maps of the mines! Another thing to put in his report. He scrutinizes the markings a moment longer under the light, then returns his attention to his teammate. “I’ll follow your lead. Let’s stay alert.”