Chapter 12—Captain Hatteras The Forward was advancing rapidly under steam between the ice-fields and the mountains of ice. Johnson was at the helm. Shandon was examining the horizon with his snow-spectacles; but his joy was brief, for he soon saw that the passage was blocked up by a circle of mountains. Nevertheless, he preferred to take his chances with pushing on, to returning. The dog followed the brig on the ice, but he kept at a respectful distance. Only, if he lagged too far, there was to be heard a singular whistle which at once brought him on. The first time that this whistle was heard, the sailors looked around; they were alone on the deck, talking together; there was no unknown person there; and yet this whistle was often repeated. Clifton was the first to take alarm. “Do y