On the other side, we find a narrow cor ridor sliding into darknes s. "These w alls are actua lly a relief," Navidson co mments after he has been walking for a while. "I ne ver thought t his labyrinth would beap leasant thin g to return to." Excep t the futhe r he goes, t he smaller t he hallway gets, unti 1 he has t o remove his pack and crou ch. So on he i son all fours p ushing his pac k in fro ntofhi