"Out of the frying pan into the ice box!" Ray jested grimly as we dropped, to the frozen plain.
Quickly we tore open our packs. Ray and I snatched out clothing and wrapped up the trembling girl. In a few minutes we had her snugly dressed in the fur garments that had been Major Meriden's. Then we got into the quilted garments we had made for ourselves.
The intensely red heat-beam still flared up the shaft. Ray looked at it in satisfaction.
"They'll have it so hot they can't get up it for some time yet," he remarked hopefully.
We shouldered our packs and set out over the wilderness of snow, turning our backs upon the metal-bound lake of fire, with the tall cone of iridescent flame rising in its center.
The deep, purple-blue sky was clear, and, for a rarity, there was not much wind. I doubt that the temperature was twenty below. But it was a violent change from the warm cavern. Mildred was blue and shivering.
n two hours the metal rim below the great white cone had vanished behind the black ice-crags. We passed near the wreck of Major Meriden's plane and reached our last camp, where we had left the tent sledge, primus stove, and most of our instruments. The tent was still stretched, though banked with snow. We got Mildred inside, chafed her hands, and soon had her comfortable.
Then Ray went out and soon returned with a sealed tin of oil from the wrecked plane, with which he lit the primus stove. Soon the tent was warm. We melted snow and cooked thick red soup. After the girl had made a meal of the scalding soup, with the little golden cakes, she professed to be feeling as well as ever.