内容简介：
If you had stood there in the edge of the bleak spruce forest, with the wind moaning dismally through the twisting trees - midnight of deep December - the Transcontinental would have looked like a thing of fire; dull fire, glowing with a smouldering warmth, but of strange ghostliness and out of place. It was a weird shadow, helpless and without motion, and black as the half-Arctic night save for the band of illumination that cut it in twain from the first coach to the last, with a space like an inky hyphen where the baggage car lay. Out of the North came armies of snow-laden clouds that scudded just above the earth, and with these clouds came now and then a shrieking mockery of wind to taunt this stricken creation of man and the creatures it sheltered - men and women who had begun to shiver, and whose tense white faces stared with increasing anxiety into the mysterious darkness of the night that hung like a sable curtain ten feet from the car windows.