"More of us with arrows in our bellies," Grenn complained, but the custom did seem to give his brothers heart, so Jon let the names stand and the wagering continue.

On the edge of the Wall an ornate brass Myrish eye stood on three spindly legs. Maester Aemon had once used it to peer at the stars, before his own eyes had failed him. Jon swung the tube down to have a look at the foe. Even at this distance there was no mistaking Mance Rayder's huge white tent, sewn together from the pelts of snow bears. The Myrish lenses brought the wildlings close enough for him to make out faces. Of Mance himself he saw no sign this morning, but his woman Dalla was outside tending the fire, while her sister Val milked a she-goat beside the tent. Dalla looked so big it was a wonder she could move. The child must be coming very soon, Jon thought. He swiveled the eye east and searched amongst the tents and trees till he found the turtle. That will be coming very soon as well. The wildlings had skinned one of the dead mammoths during the night, and they were lashing the raw bloody hide over the turtle's roof, one more layer on top of the sheepskins and pelts. The turtle had a rounded top and eight huge wheels, and under the hides was a stout wooden frame. When the wildlings had begun knocking it together, Satin thought they were building a ship. Not far wrong. The turtle was a hull turned upside down and opened fore and aft; a longhall on wheels.

"It's done, isn't it?" asked Grenn.

"Near enough." Jon shoved away the eye. "It will come today, most like. Did you fill the barrels?"

"Every one. They froze hard during the night, Pyp checked."

Grenn had changed a great deal from the big, clumsy, red-necked boy Jon had first befriended. He had grown half a foot, his chest and shoulders had thickened, and he had not cut his hair nor trimmed his beard since the Fist of the First Men. It made him look as huge and shaggy as an aurochs, the mocking name that Ser Alliser Thorne had hung on him during training. He looked weary now, though. When Jon said as much, he nodded. "I heard their axes all night. Couldn't sleep for all the chopping."

"Then go sleep now."

"I don't need - "

"You do. I want you rested. Go on, I'm not going to let you sleep through the fight." He made himself smile. "You're the only one who can move those bloody barrels."

Grenn went off muttering, and Jon returned to the far eye, searching the wildling camp. From time to time an arrow would sail past overhead, but he had learned to ignore those. The range was long and the angle was bad, the chances of being hit were small. He still saw no sign of Mance Rayder in the camp, but he spied Tormund Giantsbane and two of his sons around the turtle. The sons were struggling with the mammoth hide while Tormund gnawed on the roast leg of a goat and bellowed orders. Elsewhere he found the wildling skinchanger, Varamyr Sixskins, walking through the trees with his shadowcat dogging his heels.

When he heard the rattle of the winch chains and the iron groan of the cage door opening, he knew it would be Hobb bringing their breakfast as he did every morning. The sight of Mance's turtle had robbed Jon of his appetite. Their oil was all but gone, and the last barrel of pitch had been rolled off the Wall two nights ago. They would soon run short of arrows as well, and there were no fletchers making more. And the night before last, a raven had come from the west, from Ser Denys Mallister. Bowen Marsh had chased the wildlings all the way to the Shadow Tower, it seemed, and then farther, down into the gloom of the Gorge. At the Bridge of Skulls he had met the Weeper and three hundred wildlings and won a bloody battle. But the victory had been a costly one. More than a hundred brothers slain, among them Ser Endrew Tarth and Ser Aladale Wynch. The Old Pomegranate himself had been carried back to the Shadow Tower sorely wounded. Maester Mullin was tending him, but it would be some time before he was fit to return to Castle Black.

When he had read that, Jon had dispatched Zei to Mole's Town on their best horse to plead with the villagers to help man the Wall. She never returned. When he sent Mully after her, he came back to report the whole village deserted, even the brothel. Most likely Zei had followed them, straight down the kingsroad. Maybe we should all do the same, Jon reflected glumly.

He made himself eat, hungry or no. Bad enough he could not sleep, he could not go on without food as well. Besides, this might be my last meal. It might be the last meal for all of us. So it was that Jon had a belly full of bread, bacon, onions, and cheese when he heard Horse shout, "IT'S COMING!"

No one needed to ask what "it" was. Nor did Jon need the maester's Myrish eye to see it creeping out from amongst the tents and trees. "It doesn't really look much like a turtle," Satin commented. "Turtles don't have fur."

"Most of them don't have wheels either," said Pyp.

"Sound the warhorn," Jon commanded, and Kegs blew two long blasts, to wake Grenn and the other sleepers who'd had the watch during the night. If the wildlings were coming, the Wall would need every man. Gods know, we have few enough. Jon looked at Pyp and Kegs and Satin, Horse and Owen the Oaf, Tim Tangletongue, Mully, Spare Boot, and the rest, and tried to imagine them going belly to belly and blade to blade against a hundred screaming wildlings, in the freezing darkness of that tunnel, with only a few iron bars between them. That was what it would come down to, unless they could stop the turtle before the gate was breached.

"It's big," Horse said.

Pyp smacked his lips. "Think of all the soup it will make." The jape was stillborn. Even Pyp sounded tired. He looks half dead, thought Jon, but so do we all. The King-beyond-the-Wall had so many men that he could throw fresh attackers at them every time, but the same handful of black brothers had to meet every assault, and it had worn them ragged.

The men beneath the wood and hides would be pulling hard, Jon knew, putting their shoulders into it, straining to keep the wheels turning, but once the turtle was flush against the gate they would exchange their ropes for axes. At least Mance was not sending his mammoths today. Jon was glad of that. Their awesome strength was wasted on the Wall, and their size only made them easy targets. The last had been a day and a half in the dying, its mournful trumpetings terrible to hear.

The turtle crept slowly through stones and stumps and brush. The earlier attacks had cost the free folk a hundred lives or more. Most still lay where they had fallen. In the lulls the crows would come and pay them court, but now the birds fled screeching. They liked the look of that turtle no more than he did.

Satin, Horse, and the others were looking to him, Jon knew, waiting for his orders. He was so tired, he hardly knew any more. The Wall is mine, he reminded himself. "Owen, Horse, to the catapults. Kegs, you and Spare Boot on the scorpions. The rest of you string your bows. Fire arrows. Let's see if we can burn it." It was likely to be a futile gesture, Jon knew, but it had to be better than standing helpless.

Cumbersome and slow-moving, the turtle made for an easy shot, and his archers and crossbowmen soon turned it into a lumbering wooden hedgehog . . . but the wet hides protected it, just as they had the mantlets, and the flaming arrows guttered out almost as soon as they struck. Jon cursed under his breath. "Scorpions," he commanded. "Catapults."

The scorpions bolts punched deep into the pelts, but did no more damage than the fire arrows. The rocks went bouncing off the turtle's roof, leaving dimples in the thick layers of hides. A stone from one of the trebuchets might have crushed it, but the one machine was still broken, and the wildlings had gone wide around the area where the other dropped its loads.

"Jon, it's still coming," said Owen the Oaf.

He could see that for himself. Inch by inch, yard by yard, the turtle crept closer, rolling, rumbling and rocking as it crossed the killing ground. Once the wildlings got it flush against the Wall, it would give them all the shelter they needed while their axes crashed through the hastily-repaired outer gates. Inside, under the ice, they would clear the loose rubble from the tunnel in a matter of hours, and then there would be nothing to stop them but two iron gates, a few half-frozen corpses, and whatever brothers Jon cared to throw in their path, to fight and die down in the dark.

To his left, the catapult made a thunk and filled the air with spinning stones. They plonked down on the turtle like hail, and caromed harmlessly aside. The wildling archers were still loosing arrows from behind their mantlets. One thudded into the face of a straw man, and Pyp said, "Four for Watt of Long Lake! We have a tie!" The next shaft whistled past his own ear, however. "Fie!" he shouted down. "I'm not in the tourney!"

"The hides won't burn," Jon said, as much to himself as to the others. Their only hope was to try and crush the turtle when it reached the Wall. For that, they needed boulders. No matter how stoutly built the turtle was, a huge chunk of rock crashing straight down on top of it from seven hundred feet was bound to do some damage. "Grenn, Owen, Kegs, it's time."

Alongside the warming shed a dozen stout oaken barrels were lined up in a row. They were full of crushed rock; the gravel that the black brothers customarily spread on the footpaths to give themselves better footing atop the Wall. Yesterday, after he'd seen the free folk covering the turtle with sheepskins, Jon told Grenn to pour water into the barrels, as much as they would take. The water would seep down through the crushed stone, and overnight the whole thing would freeze solid. It was the nearest thing to a boulder they were going to get.

"Why do we need to freeze it?" Grenn had asked him. "Why don't we just roll the barrels off the way they are?"

Jon answered, "If they crash against the Wall on the way down they'll burst, and loose gravel will spray everywhere. We don't want to rain pebbles on the whoresons."

He put his shoulder to the one barrel with Grenn, while Kegs and Owen were wrestling with another. Together they rocked it back and forth to break the grip of the ice that had formed around its bottom. "The bugger weighs a ton," said Grenn.

"Tip it over and roll it," Jon said. "Careful, if it rolls over your foot you'll end up like Spare Boot."

Once the barrel was on its side, Jon grabbed a torch and waved it above the surface of the Wall, back and forth, just enough to melt the ice a little. The thin film of water helped the barrel roll more easily. Too easily, in fact; they almost lost it. But finally, with four of them pooling their efforts, they rolled their boulder to the edge and stood it up again.

They had four of the big oak barrels lined up above the gate by the time Pyp shouted, "There's a turtle at our door!" Jon braced his injured leg and leaned out for a look. Hoardings, Marsh should have built hoardings. So many things they should have done. The wildlings were dragging the dead giants away from the gate. Horse and Mully were dropping rocks down on them, and Jon thought he saw one man go down, but the stones were too small to have any effect on the turtle itself. He wondered what the free folk would do about the dead mammoth in the path, but then he saw. The turtle was almost as wide as a longhall, so they simply pushed it over the carcass. His leg twitched, but Horse caught his arm and drew him back to safety. "You shouldn't lean out like that," the boy said.

"We should have built hoardings." Jon thought he could hear the crash of axes on wood, but that was probably just fear ringing in his ears. He looked to Grenn. "Do it."