"Yon tower's quiet," the ferryman said.

"Aye," said Caspar Threlkeld, "and so am I. I talk, mind, but I sing nowt."

The ferryman gave the cliff top a true frightened look. "It hummed last Sunday."

"And Sunday before that?"

"Every evening at the turn," the ferryman said. "Like a glass being rubbed round. T' old Keeper used to ring it proper. Now it only hums." He spat into the harbor. "You're brave or a fool, goin' up theer."

"I'm both," Caspar said, and paid his crossing and walked off whistling up the wet clinkers of the path, his satchel swinging. He was a thin man in a patched good coat, with the look of a man who has been many places and carried none of them well.

The town of Barrowhaugh was a fist of thatch and stone clenched on a headland of blue clay. The sea had worried at the clay for a thousand years and thinned it to a lip of red under the houses. Way out at the end of that lip, on the very joint of the land, stood the Wearing Tower. A needle of old dressed stone, gone gray and rotten with salt, leaning a hand's breadth out of true. Wind worked the joints. Ivy had got in. The tower was not built there so much as left there, the way a grief is left, and it was wearing away. You saw the wearing from the harbor: the edges gone blunt, the corners softened, the whole thing the shape of what used to be a tower. Caspar looked at it and felt, for no reason he could name, that he was looking at his own coat in a pawnshop window.

He wrote that night by a guttering candle in the Goose's Tit. "Brother Aldous," he wrote, "your box is still sealed on my shoulder and I am already fond of every thief in Barrowhaugh. It's a town of small windows and small talk and one great great fear. The tower hums at the turn. They say the old Keeper has gone deaf or daft or dead, and they will not go up to see which. I am the messenger, and a messenger must deliver, and so I will deliver. I've eaten worse for less. Do not worry. You taught me the psalms and the proper way to split a crab, and between the two I am a serious man, or near enough."

He had been Aldous's boy at the Priory of St. Wilfrid of the Ford, years ago, before the running years. Aldous was a hard skull of a man with a soft word locked inside it, the only man alive who had ever told Caspar the truth and made it sound like a kindness. Caspar carried Aldous's letters next to his skin and his devotion in his teeth. He would have walked into the sea for the old man, which was perhaps, he often thought, why Aldous never asked him to.

At the inn the sexton would not sit near him. "I know what you carry," the sexton said, meaning the box.

"And what's that?"

"A black thought in a good wood."

"You'd make a porter," Caspar said, "the way you read the freight." He bought the sexton a drink, because a man who fears is a man who knows. "Is old Wrenne dead?"

"Aye."

"Then why don't you go up and say a prayer over him?"

"Because the tower's wearing," the sexton said, and the word had a weight in his mouth like a swallowed key. "It wears you while you stand in it. It wears the stone off your soul. The last Keeper wore through. That's what the hum is. That's the wearing." He drank. "A man who goes up theer comes down lighter by all the things he were."

Caspar laughed and clapped him and left the drink paid. But that night, on the narrow bed, he lay looking at the ceiling and heard the hum come off the cliff, a long low note through the walls, and it was the loneliest sound he had ever not-quite heard.

He climbed at dawn. The tower door was small and round, a door for a shorter folk, or a braver. It gave on a stair, and the stair was the wornest thing Caspar had ever stuck his nose into. The stone steps were scratched into hollows, each one a shallow cup ground by feet. Eight hundred years of feet, he thought, climbing to ring a bell to stop the sea taking the town. Eight hundred years of the same step, the same turn, the same pull. It was the same step, laid one after another, wore in the same curve, and the same curve was now so deep a man could lie down in it and sleep. The walls were grooved where passing hands had steadied themselves, long soft runnels in the stone. The tower wore the way he wore. It was a kind of mirror, and he did not yet know it.

The high chamber was the whole top of the tower, one round room of sweet ancient stone, and Caspar, who had seen cathedrals, stopped at the top and let his breath out in a whistle. The place was larger than the tower could hold. It smelled of old silver and salt and a hum that you felt through your boots. There was a chair, and in it a man.

The man was Father Wrenne, the Keeper, dead long enough to be tidied by wind. His mouth was open. One hand lay along the bell rope, and the rope went up into the dark of the roof, and the dark held the great bell, which Caspar had hoped to see and now could not, because the dark swallowed the lantern a full step below the rope's end.

"Right," Caspar said aloud, into the eating silence. "Nowt for it."

He set the box on the top step. He said a patter of half-remembered Latin over old Wrenne, because it felt right and because Wrenne looked like a man who had liked a bit of chat. Then he did what the town should have done and the town had shirked, and the act was in his nature. He laid hold of the rope and pulled.

The bell did not ring. It had been worn by ringing — that was the truth of the tower — worn down, worn thin, one sheet of silver old as the old moon. The clapper that had once filled the sky was now a knob of pewter the size of a baby's fist. The pull brought the rope to a dead soft weight. The bell said nothing.

Then the hum came. It came up the rope into his hands, into his wrists, up his arms into his chest, and it unlocked the thing that had been locked in his chest for twelve years, and Caspar let go of the rope. He sat down hard on the worn floor and put his head on his knees. For in Silverwell, twelve years before, Caspar had not been a messenger. He had been the bell-ringer's son, and when the great winter flood took the village, he had run. He had run with his brother's voice behind him in the water, and he had not turned, and his brother had gone down. The village had not cast him out. The village had loved him, which was worse. He had cast himself out, and had carried the running boy in his chest ever since, the boy who hummed under everything. The hum had answered him. The bell had given its whole worn self to that one silent stroke, and the stroke had gone down into the blue clay and bought the town forty days. Forty days. And then the sea would come for what it was owed.

He read Aldous's instructions then, in the dark, with the dead Keeper for company. "If the Keeper is gone, ring once. One stroke is all the poor thing has left. It will hold the cliff one tide-season. Then the sea comes. There is a last page. Read it when you are alone."

The last page was a single leaf, and on it the old man had written, in the same fine black script: "Justice will come, Caspar. Not for them. For you. It does not come to the man who runs; it comes to the man who stands, and it is not the same shape as what he owed. A man's debts need not be paid to the men he owes. They may be paid to the next man, the next town, the next boy. Say the binding, lad, and be done with running."

Above, the great worn bell turned half a degree in the dark and settled, and Caspar understood the whole architecture of it. He could not bind the cliff. But someone could. Someone worn thin as the silver, hollowed by a long running, whose own life was a thing already spent — that someone could climb the tower and sit with the rope and speak the old words, and the sea would observe the binding for a hundred years. The town would stand. The children would grow. The man would not, but the man's throat would be the bell's throat, and the faded frequency would live in him, and go up like smoke, and the town would be safe for the children's children.

The binding could not be rung by a man with somewhere to be. That was why Aldous had sent him. Not the bravest man in Westmoreland. It took a man burned hollow, a man who could not go home because he had made his home a coat and carried it on his back, a man with no one left but an old prior who had told him the truth. It took the boy who had run. It took Caspar.

He went to the mirror. It was old bronze in the far wall, called in Barrowhaugh the Reckoning. All the Keepers had looked in it, and the bronze was worn, worn the way the stairs were worn, worn by faces. Caspar looked. The mirror showed him a thin man with a wet mouth, and behind the man the dead Keeper, and behind the dead Keeper the dark. It showed him the boy at Silverwell, the boy who had run, and the boy's face was not a coward's face. It was a boy's face, that is all. A boy who made one wrong turn in a roaring black water and paid for it every day since. The mirror did not judge. It only wore.

Caspar looked his length in it. He did not blink. He grinned, and the grin was the old grin, the lighterman's grin. "Well, tha's the man," he said. "Tha's t'boy what run. Tha's the hum in t'glass. But tha'rt nowt to fear, because tha'rt me, and I have conquered thee." He leaned forward and tapped his own forehead gently against the bronze, like a blessing. "Tha can rest now, lad," he said. "Tha can stop."

And the mirror, which had held him, let him go, and went dark, like a blown lamp.

He wrote the long letter that night in the Goose's Tit, for the price of a room he would not use. The letter was to Aldous. "Dear Aldous," he wrote. "I did your errand. I read your second page three times, and I have decided I am too stupid for binding, and so I will do it, because only a stupid man would do it and do it smiling. Do not grieve. Grief is worn out in me, and that is what makes me fit. The sea will keep her word if I keep mine. Tell the children of Barrowhaugh the bell was always theirs. Tell Silverwell I stopped running at last, at the end of the world, where the road gives out. You are the sea-wall of my life, and I tell you what I never told you: I would have walked into the sea for you, old man, and now I walk into it for everyone, which is a better bargain and a cheaper fare. Justice will come. It came to me, and I did not deserve it, and I took it anyway, which is the only way to take it. Your friend, in all weathers, C."

He sealed it with Aldous's ring and put it in the box and left the box on the altar of the cliff chapel, where the town would find it in the morning. Then he climbed the tower in the dark, singing.

He sat down in the dead Keeper's chair. He put his hand on the rope. He spoke the binding, the long low old psalm that Aldous had taught him, the one about the sea and the stones and the city that stands because one man stands. The words were old and worn as everything else in that place, and Caspar spoke them in his own weather-beaten voice, with the bad accent and the good heart and the last breath of a long running. At the end he said "Amen," and meant it for the first time in twelve years.

The bell above him did not ring. But the hum came. It came down the rope into his hands, into his wrists, up his arms into his chest, and it was the most beautiful thing Caspar Threlkeld had ever felt, because it was the sound of a man standing. He held the rope until morning. He was still holding it at midday when the sea took the tower at last, and the worn stones came down, and the blue clay closed over them.

The town of Barrowhaugh stands. The children were told the bell was always theirs. The sea will keep its word for a hundred years, which is all any of us can ask of the sea. Brother Aldous lived seven more years, and he never spoke of Caspar Threlkeld without splitting a crab for no one and setting it down on an empty plate.

And if you stand at the cliff's end at the turning of the tide, on the low days, you can hear it. Most say it is the wind in the old foundations. The wind, there, has a name. It is a ringing, worn thin as a sheet of old silver, a single slow note carried over the water — the faded frequency, still going, still going. The bell of a man who ran for twelve years and then stood long enough to last.