We went back to the wreck, found the tools, and removed an undamaged propeller. This we packed on the sledge, with a good supply of fuel for the stove.
"I'm sure we're safe now, so far as the crab-things go," he said. "I don't fancy they'd get around very well in the snow."
In an hour we broke camp, and made ten miles of the distance back to the plane before we stopped. We were anxious about Mildred, but she seemed to stand the journey admirably; she is a marvelous physical specimen. She seemed running over with gay vivacity of spirit; she asked innumerable questions of the world which she had known only at second-hand from her mother's words.
The weather smiled on us during the march back to the plane as much as it had frowned on the terrible journey to the cone. We had an abundance of food and fuel, and we made it in eight easy stages. Once there was a light fall of snow, but the air was unusually warm and calm for the season.
We found the plane safe. It was the work of but a short time to remove the broken propeller and replace it with the one we had brought from the wrecked ship. We warmed and started the engine, broke the skids loose from the ice, turned the plane around, and took off safely from the tiny scrap of smooth ice.
Mildred seemed amazed and immensely delighted at the sensations of her first trip aloft.
A few hours later we were landing beside the _Albatross_, in the leaden blue sea beyond the ice barrier. Bluff Captain Harper greeted us in amazed delight as we climbed to the deck.
"You're just in time!" he said. "The relief expedition we landed came back a week ago. We had no idea you could still be alive, with only a week's provisions. We were sailing to-morrow. But tell us! What happened? Your passenger--"
"We just stopped to pick up my fiancee," Ray grinned. "Captain, may I present Miss Mildred Meriden? We'll be wanting you to marry us right away."
It is possible that future study may tell man enough about insects to enable him to eradicate them. This, however, is more than can be reasonably expected, for the more we cultivate the earth the better we make conditions for these enemies. The insect thrives on the work of man. And having made conditions ideal for the insect, with great expanses of cultivated food fitted to his needs, it is an optimist who can believe that at the same time we can make other conditions which will be so unfavorable as to cause him to disappear completely. The two things do not go together.