Coming out into the pale sunlight, the man snugged his cloak close around his neck. Between the looming inner wall and the lower, but still formidable, outer works, was an open terrace called the peribolos. It was narrow, perhaps fifteen paces across, and filled with more gangs of workers with mauls and picks, engineers in tented hats with wax tablets under their arms, lines of soldiers in red and gray, marching south toward the sea. Rising up above the stream of humanity was a second rampart, the protichisma, and that was where the work of battle was focused. This wall was only thirty feet high, but studded with towers and battlements like the inner works.

Nicholas glanced about and then made his way to the base of an opensided wooden tower that had been built alongside the Wall. As he climbed the stairs housed within, his eyes were restless- counting the numbers of men in the street, gauging the strength of the massive granite blocks that old Emperor Constantine's engineers and the Hippodrome factions had mortised together to make the outer rampart of the greatest city in the world. This was a friendly city to him, at least at the moment, but in this line of work it was hard to let go of old habits. Today, seeing this awesome strength, he was pleased, but he wondered idly what he would think if he stood beyond the walls, looking down from the hills of Thrace at the object of desire.

I would see a damnably huge city, girdled by walls and towers and battlements unmatched in the world. That is what I would see.

The wind out of the north was cold on the top of the Wall, biting at his ears and snapping his cloak around his shoulders. The heavy gray clouds had parted again, letting streaks of wan sunlight through. The air here was fresh, though, and he breathed deeply, smelling the pine resin of distant fires and the sharp tang of the sea. That smell, after the fetid closeness of the city, brought a smile to his face. There were many days when he hated the urb. Memories of a pine deck twisting under his feet, sea spray in his face, and the boom of surf from the Caledonian shore tugged at him. Sadly, he put those thoughts away. Fifty paces to his left, the octagonal towers of the Number Two Military Gate rose up, dark and foreboding, their surfaces scarred by the impact of bolts and stones. He walked that way.

To his right, the crenellations of the battlement jutted up like broken teeth. The embrasures between them were stained with long streaks of dried blood and nicked by the passage of arms that had coursed along the Wall in hurried violence for the past three years. Roman soldiers stood in the lee of the great stones, their cloaks wrapped tight around their shoulders. Some held steaming mugs of hot wine. Each man looked him over as he passed, and he nodded to some. The heavy mail tunic that he wore under his cloak and linen shirt felt close and comfortable on his body. It was backed by a tough garment of felt, and then- in a nod to vanitas- a silk tunic. A thin film of ice had formed on the walkway during the night, and his hobnailed boots crunched through it as he walked.

The near tower loomed over his head, rising another twenty feet from the bulk of the Wall. It was squat and massive, brooding over the doubly gated passageway below it. An overhanging platform crowned it, reinforced with a wooden wall covered with hides. It looked out over the half-frozen, brackish waters of a canal that ran at the foot of the rampart. The canal was twenty feet wide and choked with debris; it ran from the southern end of the Wall- at the shore of the Propontisto the north, where the last half mile descended into a brick-lined tunnel under the old Blachernae palace before it reached the waters of the Golden Horn. All summer the soldiers and slaves of the besieging army had been dumping bundles of brush, wicker, and dirt into it, trying to fill the barrier. The Great Khagan of the Avars intended to break the walls of the city, but his mobs of Slavic spear and axemen had to get at the walls somehow. The Roman defenders had spent just as much time clearing the fill away. Too, the blackened timbers of smashed siege towers and burned-out mantlets jutted from the dark surface of the canal and littered the ground just beyond. Nicholas stopped short of the tower Wall and leaned out of the nearest embrasure.

An open field lay before the city, sloping down to the distant woods and outlying buildings of the Thracian countryside. The field was scattered with snow-covered mounds and lumps- the detritus of three years of war. Beyond it, a half mile away, the Avars had their siege line- a confused jumble of camps and hastily built fortifications in a long arc facing the walls of the city. The barbarians, horsemen from the steppes beyond Chersonensus in the far north, had overwhelmed the Balkan provinces of the Eastern Empire a generation before, but had only recently tested their strength against the capital. The host that their khagan had raised dwarfed the number of fighting men in the city- Nicholas knew there were at least fifty thousand barbarians out there. More were probably coming. The promise of the sack of the greatest city in the world drew the outlanders like flies to rotting meat.

The Wall had thrown back great armies before, and the men that defended the city were not concerned. Nicholas wondered, as he walked, at the audacity of an emperor who would raise an army and then leave his capital, still under siege, to fight another war far away. It seemed insane- insane and wholly trusting in the work of his predecessors- that this city could stand against anything that the Avar Khanate could bring against it.

He's not been wrong so far, he thought. But if there is ever a first time:

A sandy-haired centurion was standing at the base of the tower, leaning one thick arm on the top of the fighting wall. His helmet hung at his side, secured by a loop of cloth to his belt. A long sword, thicker and heavier than that usually favored by Imperial troops, was slung at his side. He was staring out over the snowy fields, watching the smoke curl up from the cookfires of the enemy.

"A cold day to be fighting," Nicholas said as he came up to the narrow door.

The centurion turned, watery blue eyes looking the stranger up and down with a patient, steady manner. A little cloud of breath puffed from his chapped lips.

" 'Tis cold," the soldier said. "There will be fighting soon, though. Mayhap not here, but at least down there." The centurion turned a little and pointed off down the line of the massive walls toward the sea. "There, at the Golden Gate. The barbs have ten or twelve engines moving- do you hear the squeak of their wheels? They should use black grease instead of that pig fat- it burns off the axles too quickly."

"I hear it. I'm Nicholas of Roskilde. Things are quiet here?"

"Aye." The centurion gazed at Nicholas steadily. "You've business on the Wall?"

Nicholas looked out over the field, rubbing his chin with his right hand. "Faction business," he said. "I'm owing a favor to a kindly man. I was thinking there might be some work afoot up here, what with your friends yonder."

The centurion raised an eyebrow and made a clucking sound with his teeth. "You come looking for some fighting, go down to the Golden Gate. This section is well quiet. You must owe this fellow more than a little to risk your neck on the Wall."

Nicholas shrugged, looking back at the soldier with a guileless expression. "Three squares a day, plus wine or mead if there is any."

Suspicion flickered across the centurion's face, then it cleared. " You, ah, find yourself without an emperor or two to rub together, then?"

Nicholas nodded, summoning up a shamed look. "I was on a ship- there was a game of chance- I found myself on the docks of this city, wondering at its awesome size and greatness. More than one night I spent sleeping in the alleys of the Racing District."