Jack rolled over on his belly to find the floor loosely paved with rock-slabs bearing imprints of sundry other Book-of-Revelation fauna. 'What river carried this supposed dirt? We're in the middle of a mountain of rock. There is no river, ' Jack informed the Doctor, after they had gotten Eliza on her way down the tunnel. Jack waited with her traveling-dress slung over his arm while she inched down the tunnel in her knickers and an arsch-leder.