Chapter 25—One of James Ross’s Foxes On that day the thermometer fell to three degrees below zero. The day was calm; the cold was very endurable in the absence of wind. Hatteras took advantage of the clearness of the air to reconnoitre the surrounding plains; he ascended one of the highest icebergs to the north, but even with his glass he could make out nothing but a series of ice-mountains and ice-fields. There was no land in sight, nothing but gloomy confusion. He returned, and tried to calculate the probable length of their imprisonment. The hunters, and among them the doctor, James Wall, Simpson, Johnson, and Bell, kept them supplied with fresh meat. The birds had disappeared, seeking a milder climate in the south. The ptarmigans alone, a sort of rock-partridge peculiar to this latit