"Paul emerged from out of the gloaming"

Gloaming, means ‘twilight’ or ‘dusk’ and comes from the Old English word glōmung. Scott also comments on the variability of the wind and the difficulty of ‘sailing’:

The wind is strong from the south, and this afternoon has been very helpful with the full sail.

But soon after;

Blizzards are our bugbear, not only stopping our marches but the cold damp air takes it out of us.