He went under and held his breath. The panic left him. Now he felt scared, but calm. He had played in the sea as a child – a seaside village nad been among his father’s domains – and he knew he would rise to the surface, though it might seem to take a long time. He was weighed down by his thick travelling clothes, now saturated, and by his sword. If he had been wearing armour, he would have sunk to the bottom and stayed there for ever. But at last his head broke the surface and he gasped for breath.

He had swum a good deal as a boy, but that was many years ago. All the same, the technique came back to him, more or less, and he was able to keep his head above water. He began to thrash his way towards the north bank. Beside him, he recognized the chestnut coat and black mane of Griff, doing the same as he was, swimming for the nearest shore.

The horse’s gait changed, and he realized it had found its footing. Ralph let his feet drift down to the river bed and found that he, too, could stand. He waded through the shallows. The sticky mud of the bottom seemed to be trying to suck him back into midstream. Griff hauled himself on to a narrow strip of beach below the priory wall. Ralph did the same.

He turned and looked back. There were several hundred people in the water, many bleeding, many screaming, many dead. Near the edge he saw a figure wearing the red-and-black livery of the earl of Shiring, floating face down. He stepped back into the water, grabbed the man by the belt, and hauled him ashore.

He turned the heavy body over, and his heart lurched with recognition. It was his friend Stephen. The face was unmarked, but Stephen’s chest appeared to have caved in. His eyes were wide open, showing no sign of life. There was no breath. The body was too damaged even for Ralph to feel for a heartbeat. A few minutes ago I was envying him, Ralph thought. Now I’m the lucky one.

Feeling irrationally guilty, he closed Stephen’s eyes.

He thought of his parents. Only a few minutes ago he had left them in the stable yard. Even if they had followed him, they could not have reached the bridge yet. They must be safe.

Where was Lady Philippa? Ralph cast his mind back to the scene on the bridge just before the collapse. Lord William and Philippa had been at the rear of the earl’s procession, and had not yet ridden on to the bridge.

But the earl had.

Ralph could picture the scene quite clearly. Earl Roland had been close behind him, impatiently urging his horse, Victory, forward through the gap in the crowd made by Ralph on Griff. Roland must have fallen close to Ralph.

Ralph heard again his father’s words: “Be constantly on the alert for ways to please the earl.” Perhaps this was the big chance he had been looking for, he thought excitedly. He might not have to wait for a war. He could distinguish himself today. He would save Earl Roland – or even just Victory.

The thought energized him. He scanned the river. The earl had been wearing a distinctive purple robe and a black velvet surcoat. It was hard to pick out an individual in the seething mass of bodies, alive and dead. Then he saw a black stallion with a distinctive white patch over one eye, and his heart leaped: it was Roland’s mount. Victory was thrashing around in the water, apparently unable to swim in a straight line, probably having broken one or more legs.

Floating next to the horse was a tall figure in a purple robe.

This was Ralph’s moment.

He threw off his outer clothing: it would hamper his swimming. Wearing only his underdrawers, he plunged back into the river and swam towards the earl. He had to force his way through a mass of men, women and children. Many of the living grabbed desperately at him, delaying his progress. He fought them off ruthlessly with merciless blows of his fists.

At last he reached Victory. The beast’s struggles were weakening. It was still for a moment, and started to sink; then, when its head dipped into the water, it began to struggle again. “Easy, boy, easy,” Ralph said into its ear; but he felt sure it was going to drown.

Roland was floating on his back, eyes closed, unconscious or dead. One foot was caught in a stirrup, and that seemed to be what was keeping his body from going down. He had lost his hat, and the top of his head was a bloody mess. Ralph could not see how a man could live after such an injury. All the same, he would rescue him. There would surely be some reward just for the corpse, when it was that of an earl.

He tried to pull Roland’s foot from the stirrup, but he found the strap was twisted tight around the ankle. He felt for his knife and realized it was attached to his belt, which he had left on the shore with the rest of his outer clothing. But the earl had weapons. Ralph fumbled Roland’s dagger from its sheath.

Victory’s convulsions made it difficult for Ralph to cut the strap. Each time he caught hold of the stirrup, the dying horse jerked it from his grasp before he could bring the knife to bear on the leather. He cut the back of his own hand in the struggle. Finally he braced himself against the horse’s side with both feet, for stability, and in that position he was able to slice through the stirrup strap.

Now he had to drag the unconscious earl to the bank. Ralph was not a strong swimmer, and he was already panting with exhaustion. To make matters worse, he could not breathe through his broken nose, so his mouth kept filling with river water. He paused for a moment, leaning his weight on the doomed Victory, trying to catch his breath; but the earl’s body, now unsupported, began to sink, and Ralph realized he could not rest.

He grabbed Roland’s ankle in his right hand and started to swim for the shore. He found it harder to keep his head above the surface when he had only one hand free for swimming. He did not look back at Roland: if the earl’s head went under water there was nothing Ralph could do about it. After a few seconds he was gasping for air and his limbs were aching.

He was not used to this. He was young and strong, and his whole life was spent hunting, jousting and fencing. He could ride all day then win a wrestling match the same evening. But now he seemed to be relying on disused muscles. His neck hurt from the effort of keeping his head up. He could not help breathing water in, and that made him cough and choke. He flapped his left arm madly and just managed to keep himself afloat. He heaved at the bulky body of the earl, made heavier by its water-soaked clothing. He approached the shore with agonizing slowness.

At last he was close enough to put his feet on the river bed. Gulping air, he began to wade, still dragging Roland. When the water was thigh-high he turned and picked up the earl in his arms, and carried him the last few steps to the shore.

He put the body on the ground and collapsed beside it, exhausted. With the last of his energy, he felt the chest. There was a strong heartbeat.

Earl Roland was alive.

The collapse of the bridge paralysed Gwenda with fear. Then, an instant later, the sudden immersion in cold water shocked her back to normal.

When her head came above the surface, she found herself surrounded by brawling, yelling people. Some had found a piece of wood to keep them afloat, but every other man tried to keep himself above water by leaning on someone else. Those leaned upon felt themselves being pushed under, and lashed out with their fists to get free. Many of the blows missed. Those that connected were returned. It was like being outside a Kingsbridge tavern at midnight. It would have been comical, except that people were dying.

Gwenda gasped air and went under. She could not swim.

She came up again. To her horror, Sim Chapman was immediately in front of her, blowing water out of his mouth like a fountain. He began to go under, obviously as unable to swim as she was. In desperation, he grabbed her shoulder and tried to use her for support. She immediately sank. Finding her inadequate to keep him on the surface, he let her go.