The brute froze mid-stride and looked at Moon. "Boss?"
"Someone has been here." Moon muttered, his eyes fixed on the entrance.
"What?! Someone has been here?!" The brute's head snapped forward in shock. He stared at the cave opening, then back at Moon. "How do you know?"
Moon pointed at the ground near the entrance. "You see that pebble?"
The brute squinted. A small, flat stone sat beside the left edge of the opening. It looked completely unremarkable.
"Before we left, I placed it on top of the entrance ledge. If anyone entered or exited, the air displacement from passing through the narrow opening would knock it off." Moon crouched beside the stone. "It's on the ground now."
He stood and pointed to a very thin branch wedged horizontally between two rocks at knee height, just inside the entrance.
"I placed a branch across the passage at a height where it would catch anyone walking through in the dark. It's broken. Someone walked through it."
