Teleri fishes out a small piece of chalky rock she had been playing with and during the trip down, she has been marking the walls in elvish runes, trying to keep track of where they're going. When she hears the screams, her reaction is to go towards the sounds of the screams. When the screams stop as well as the blood, her natural caution reasserts itself.
"This feels like a trap to me," she muttered, trying to remember from which direction the screams came from. "Now where?" she asked looking at the north and south tunnels, thinking which looked worse as she fingers the chalk-rock