Several miles into their trek back to the ship, the travelers heard the sound of frolicking whales. Ordinarily these were enchanting noises. But now, coming through the fog from every direction, they indicated that the men’s fears had come true: the pack had cracked up behind them. They were surrounded by bands of open water, cut off from the large floe that held the ship. The ice on which they walked had fractured into loosely interlocking pans. The three men tried at first to jump from one to the next, hoping in this way to reach solid ice. But as evening fell, the wind changed direction and
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