“We’ll see. But you’re right, Tialys, I think. We must stay close to the boy at all costs.”
They both watched with some skepticism as Iorek Byrnison laid out the tools in his improvised workshop. The mighty workers in the ordnance factories under Lord Asriel’s fortress, with their blast furnaces and rolling mills, their anbaric forges and hydraulic presses, would have laughed at the open fire, the stone hammer, the anvil consisting of a piece of Iorek’s armor. Nevertheless, the bear had taken the measure of the task, and in the certainty of his movements the little spies began to see some quality that muffled their scorn.
When Lyra and Will came in with the bushes, Iorek directed them in placing branches carefully on the fire. He looked at each branch, turning it from side to side, and then told Will or Lyra to place it at such-and-such an angle, or to break off part and place it separately at the edge. The result was a fire of extraordinary ferocity, with all its energy concentrated at one side.
By this time the heat in the cave was intense. Iorek continued to build the fire, and made the children take two more trips down the path to ensure that there was enough fuel for the whole operation.
Then the bear turned over a small stone on the floor and told Lyra to find some more stones of the same kind. He said that those stones, when heated, gave off a gas that would surround the blade and keep the air from it, for if the hot metal came in contact with the air, it would absorb some and be weakened by it.
Lyra set about searching, and with owl-eyed Pantalaimon’s help soon had a dozen or more stones to hand. Iorek told her how to place them, and where, and showed her exactly the kind of draft she should get moving, with a leafy branch, to make sure the gas flowed evenly over the work piece.
Will was placed in charge of the fire, and Iorek spent several minutes directing him and making sure he understood the principles he was to use. So much depended on exact placement, and Iorek could not stop and correct each one; Will had to understand, and then he’d do it properly.
Furthermore, he mustn’t expect the knife to look exactly the same when it was mended. It would be shorter, because each section of the blade would have to overlap the next by a little way so they could be forged together; and the surface would have oxidized a little, despite the stone-gas, so some of the play of color would be lost; and no doubt the handle would be charred. But the blade would be just as sharp, and it would work.
So Will watched as the flames roared along the resinous twigs, and with streaming eyes and scorched hands he adjusted each fresh branch till the heat was focused as Iorek wanted it.
Meanwhile, Iorek himself was grinding and hammering a fist-sized stone, having rejected several until he found one of the right weight. With massive blows he shaped it and smoothed it, the cordite smell of smashed rocks joining the smoke in the nostrils of the two spies, watching from high up. Even Pantalaimon was active, changing to a crow so he could flap his wings and make the fire burn faster.
Eventually the hammer was formed to Iorek’s satisfaction, and he set the first two pieces of the blade of the subtle knife among the fierce-burning wood at the heart of the fire, and told Lyra to begin wafting the stone-gas over them. The bear watched, his long white face lurid in the glare, and Will saw the surface of the metal begin to glow red and then yellow and then white.
Iorek was watching closely, his paw held ready to snatch the pieces out. After a few moments the metal changed again, and the surface became shiny and glistening, and sparks just like those from a firework sprayed up from it.
Then Iorek moved. His right paw darted in and seized first one piece and then the other, holding them between the tips of his massive claws and placing them on the slab of iron that was the backplate of his armor. Will could smell the claws burning, but Iorek took no notice of that, and moving with extraordinary speed he adjusted the angle at which the pieces overlapped and then raised his left paw high and struck a blow with the rock hammer.
The knife tip leapt on the rock under the massive blow. Will was thinking that the whole of the rest of his life depended on what happened in that tiny triangle of metal, that point that searched out the gaps inside the atoms, and all his nerves trembled, sensing every flicker of every flame and the loosening of every atom in the lattice of the metal. Before this began, he had supposed that only a full-scale furnace, with the finest tools and equipment, could work on that blade; but now he saw that these were the finest tools, and that Iorek’s artistry had constructed the best furnace there could be.
Iorek roared above the clangor, “Hold it still in your mind! You have to forge it, too! This is your task as much as mine!”
Will felt his whole being quiver under the blows of the stone hammer in the bear’s fist. The second piece of the blade was heating, too, and Lyra’s leafy branch sent the hot gas along to bathe both pieces in its flow and keep out the iron-eating air. Will sensed it all and felt the atoms of the metal linking each to each across the fracture, forming new crystals again, strengthening and straightening themselves in the invisible lattice as the join came good.
“The edge!” roared Iorek. “Hold the edge in line!”
He meant with your mind, and Will did it instantly, sensing the minute snags and then the minute easement as the edges lined up perfectly. Then that join was made, and Iorek turned to the next piece.
“A new stone,” he called to Lyra, who knocked the first one aside and placed a second on the spot to heat.
Will checked the fuel and snapped a branch in two to direct the flames better, and Iorek began to work with the hammer once more. Will felt a new layer of complexity added to his task, because he had to hold the new piece in a precise relation with both the previous two, and he understood that only by doing that accurately could he help Iorek mend it.