After this they were again driven into the south for many a day, and saw no earthly shore, but everywhere unending waters.  A great wonderment to them was this immensity of the sea of ocean, wherein the land seemed a little thing lost for ever.  And ever as they drove onward, the pilot star of the north was steadfast no longer, but sank lower and still lower in the heavens, and many of the everlasting lights, which at home they had seen swing round it through the livelong night, were now sunken, as it were, in the billows.