"Yeah," Rae lets the light above them drift a little ways down the left corridor, and then down the right. "They were definitely built - or at least hollowed out - but ages ago, by the looks of things. Built, and then abandoned."

"Apart from, you know, whoever contributed their blood to the decor back ther- oh gods," Rae covers her mouth, having seen the skull and partial skeleton the hovering light had illuminated down the right passage.