“We’ll sleep here,” he said, “unless you prefer this bunk. You’re the first comer and you have first choice, you know.”

“That’s all right,” Messner answered. “One bunk’s just as good as the other.”

He spread his own bedding in the second bunk, and sat down on the edge. The stranger thrust a physician’s small travelling case under his blankets at one end to serve for a pillow.

“Doctor?” Messner asked.

“Yes,” came the answer, “but I assure you I didn’t come into the Klondike to practise.”

The woman busied herself with cooking, while the man sliced bacon and fired the stove. The light in the cabin was dim, filtering through in a small window made of onion-skin writing paper and oiled with bacon grease, so that John Messner could not make out very well what the woman looked like. Not that he tried. He seemed to have no interest in her. But she glanced curiously from time to time into the dark corner where he sat.

“Oh, it’s a great life,” the doctor proclaimed enthusiastically, pausing from sharpening his knife on the stovepipe. “What I like about it is the struggle, the endeavor with one’s own hands, the primitiveness of it, the realness.”

“The temperature is real enough,” Messner laughed.

“Do you know how cold it actually is?” the doctor demanded.

The other shook his head.

“Well, I’ll tell you. Seventy-four below zero by spirit thermometer on the sled.”

“That’s one hundred and six below freezing point-too cold for travelling, eh?”

“Practically suicide,” was the doctor’s verdict. “One exerts himself. He breathes heavily, taking into his lungs the frost itself. It chills his lungs, freezes the edges of the tissues. He gets a dry, hacking cough as the dead tissue sloughs away, and dies the following summer of pneumonia, wondering what it’s all about. I’ll stay in this cabin for a week, unless the thermometer rises at least to fifty below.”