"You hear, Bell," said the doctor, quickly; "to-morrow we shall set to work."


CHAPTER XV.

THE NORTHWEST PASSAGE.

The next day Bell, Altamont, and the doctor went to the Porpoise; they found no lack of wood; the old three-masted launch, though injured by being wrecked, could still supply abundant material for the new one. The carpenter set to work at once; they needed a seaworthy boat, which should yet be light enough to carry on a sledge. Towards the end of May the weather grew warmer; the thermometer rose above the freezing-point; the spring came in earnest this time, and the men were able to lay aside their winter clothing. Much rain fell, and soon the snow began to slide and melt away. Hatteras could not hide his joy at seeing the first signs of thaw in the ice-fields. The open sea meant liberty for him.

"The carpenter set to work at once."

Whether or not his predecessors had been wrong on this great question of an open polar sea, he hoped soon to know. All chance of success in his undertaking depended on this. One evening, after a warm day in which the ice had given unmistakable signs of breaking up, he turned the conversation to the question of an open sea. He took up the familiar arguments, and found the doctor, as ever, a warm advocate of his doctrine. Besides, his conclusions were evidently accurate.