He would think necklaces far more crazy than what she's doing now. He moves on though - and after another hundred yards or so stops dead, listening.

There's nothing to be heard. But there is a change in the air, suggesting that the tunnel changes somehow ahead. He turns his head to her and murmurs quietly. 'What do they normally keep down here? It opens out about two hundred yards further down. Is it likely to be guarded?'

Julian has good senses. He knows he's not wrong about it - but also knows that just because he doesn't hear people, doesn't mean there aren't any.