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Write a story based on this line : "By evening, she was running a high fever ... "

Far up in the mountains of Canada, there is an old abandoned log cabin. Once it was occupied by a young couple who wanted to distance themselves from the chaos of this modern world. Here they were miles away from the nearest town. Bob, the husband, made the occasional trip into town to buy supplies whereas Jan, his wife, spent her free time by the fire, sewing. Their life was simply idyllic.
Then, one midwinter's day, Jan woke up from bed with a strange ache in her bones. Putting it down to overwork, Bob shooed her to bed and made sure she rested. Though Jan was impatient to get to her chores, Bob soothed her, "Relax, Sugar. You're overdoing things. All these chores will be here when you recover."

However, Jan seemed to be getting worse instead of recovering. By evening, she was running a high fever and in greater pain. In spite of his best efforts, Bob could not manage to ease her suffering. And then suddenly, she started to lapse into unconsciousness.

It was then obvious that she was seriously ill. What could Bob do? He had no experience in treating the sick and Jan was getting worse by the minute. He knew that there was an old doctor in town but he lived three miles away, downhill. Pot-bellied and obese, there was no way the doctor could make it up to their cabin.

Something had to be done quickly! Bob racked his brains but to no avail. The only thing left to do was to go to the doctor. In Jan's condition, she could never walk that far in the waist-deep snow. Bob would have to carry her!

Bob searched his mind for a way to move poor, sick Jan. Then, he remembered. He had once made a sledge so that they could ride together over the mountain. They never got around to using it though, because the whole mountain was thickly covered with rocks and trees. He had never found a safe way down, not even once.

"Well," he thought, "looks...