"Harry!" she called.
"Come on!" he cried back.
She looked round the empty chamber; the rest of the party had evidently decided to go home, were already outside somewhere in the blundering snow. She hesitated and then darted in after Harry.
"Harry!" she shouted.
She had reached a turning-point thirty feet down; she heard a faint muffled answer far to the left, and with a touch of panic fled toward it. She passed another turning, two more yawning alleys.
"Harry!"
No answer. She started to run straight forward, and then turned like lightning and sped back the way she had come, enveloped in a sudden icy terror.
She reached a turn—was it here?—took the left and came to what should have been the outlet into the long, low room, but it was only another glittering passage with darkness at the end. She called again, but the walls gave back a flat, lifeless echo with no reverberations. Retracing her steps she turned another corner, this time following a wide passage. It was like the green lane between the parted water of the Red Sea, like a damp vault connecting empty tombs.
She slipped a little now as she walked, for ice had formed on the bottom of her overshoes; she had to run her gloves along the half-slippery, half-sticky walls to keep her balance.
"Harry!"
