[ Her smile, perhaps understandably, slides off her face. ]

Mm. It's... unpleasant to imagine that they might have been watching us, even in the moments we were certain we were alone... [ Then, with some evident effort, she hitches the smile back onto her face – for Arven's benefit more than anything. ] But perhaps with a bit of effort, we can make use of it ourselves. At the very least, it should provide a valuable clue. ... ah, if you wouldn't mind...

[ She holds out the lantern for Arven to take. ]

I'd like to see if I can find any sort of trigger or mechanism for the entrance...