"And how will you manage to entice the bears there, all to one spot?"

"I'll undertake that business; but we have talked enough, let us set to work. We have a hundred feet more to add to our passage to-night, and that is no easy matter, but as there are five of us, we can take turns at it. Bell will begin, and we will lie down and sleep meantime."

"Well, really," said Johnson, "the more I think of it, the more feasible seems the Doctor's plan."

"It is a sure one, anyway," said Clawbonny.

"So sure that I can feel the bear's fur already on my shoulder. Well, come, let's begin then."

Away he went into the gloomy passage, followed by Bell, and in a few moments they had reached the powder-magazine, and stood among the well- arranged barrels. The Doctor pointed out to his companion the exact spot where he began excavating, and then left him to his task, at which he laboured diligently for about an hour, when Altamont came to relieve him. All the snow he had dug out was taken to the kitchen and melted, to prevent its taking up room.

The captain succeeded Altamont, and was followed by Johnson. In ten hours-that is to say, about eight in the morning-the gallery was entirely open.

[Illustration: ]

With the first streak of day, the Doctor was up to reconnoitre the position of the enemy. The patient animals were still occupying their old position, prowling up and down and growling. The house had already almost disappeared beneath the piled-up blocks of ice, but even while he gazed a council of war seemed being held, which evidently resulted in the determination to alter the plan of action, for suddenly all the five bears began vigorously to pull down these same heaped-up blocks.

"What are they about?" asked Hatteras, who was standing beside him.