Pass Me A Long Tall Glass of WTF

I got this in an email entitled "Autocad 2008."

XVIII. The Northeast and Northwest Passages

Oh, I know. The snow. The effective snow.
Homeward into the howling woods, although
And trumpet at his lips;
nor does he castmarked with a dark stroke from the left, encroached

Glimmering of light:Escapees from the cold work of living,
they sit with their wives all day in the sun,
Will hear the storm-blast of his clarion. [Is this a metaphor for a fart? Z.]
The road, but not far enough ahead
Close at the end of distance the two
Chose
A kind of snow, which hesitates
It is as though I were at a second threshold