Near evening one more meter had been dug from the trench. When I returned on board, I was wellnigh asphyxiated by the carbon dioxide saturating the air. Oh, if only we had the chemical methods that would enable us to drive out this noxious gas! There was no lack of oxygen. All this water contained a considerable amount, and after it was decomposed by our powerful batteries, this life-giving elastic fluid could have been restored to us. I had thought it all out, but to no avail because the carbon dioxide produced by our breathing permeated every part of the ship. To absorb it, we would need to fill containers with potassium hydroxide and shake them continually. But this substance was missing on board and nothing else could replace it.
That evening Captain Nemo was forced to open the spigots of his air tanks and shoot a few spouts of fresh oxygen through the Nautilus’s interior. Without this precaution we wouldn’t have awakened the following morning.
The next day, March 26, I returned to my miner’s trade, working to remove the fifth meter. The Ice Bank’s side walls and underbelly had visibly thickened. Obviously they would come together before the Nautilus could break free. For an instant I was gripped by despair. My pick nearly slipped from my hands. What was the point of this digging if I was to die smothered and crushed by this water turning to stone, a torture undreamed of by even the wildest savages! I felt like I was lying in the jaws of a fearsome monster, jaws irresistibly closing.
Supervising our work, working himself, Captain Nemo passed near me just then. I touched him with my hand and pointed to the walls of our prison. The starboard wall had moved forward to a point less than four meters from the Nautilus’s hull.
The captain understood and gave me a signal to follow him. We returned on board. My diving suit removed, I went with him to the lounge.
“Professor Aronnax,” he told me, “this calls for heroic measures, or we’ll be sealed up in this solidified water as if it were cement.”
“Yes!” I said. “But what can we do?”
“Oh,” he exclaimed, “if only my Nautilus were strong enough to stand that much pressure without being crushed!”
“Well?” I asked, not catching the captain’s meaning.
“Don’t you understand,” he went on, “that the congealing of this water could come to our rescue? Don’t you see that by solidifying, it could burst these tracts of ice imprisoning us, just as its freezing can burst the hardest stones? Aren’t you aware that this force could be the instrument of our salvation rather than our destruction?”