the green shimmer.

"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