In the middle of the river, halfway across the bridge, the Portuguese engineers had inserted a drawbridge so that wine barges and other small craft could go upriver. The drawbridge spanned the widest gap between any of the pontoons and it was built of heavy oak beams overlaid with oak planks and it was drawn upward by a pair of windlasses that hauled on ropes through pulleys mounted on a pair of thick timber posts stoutly buttressed with iron struts. The whole mechanism was ponderously heavy and the drawbridge span was wide and the engineers, mindful of the contraption’s weight, had posted notices at either end of the bridge decreeing that only one wagon, carriage or gun team could use the drawbridge at any one time, but now the roadway was so crowded with refugees that the two pontoons supporting the drawbridge’s heavy span were sinking under the weight. The pontoons, like all ships, leaked, and there should have been men aboard to pump out their bilges, but those men had fled with the rest and the weight of the crowd and the slow leaking of the barges meant that the bridge inched lower and lower until the central pontoons, both of them massive barges, were entirely under water and the fast-flowing river began to break and fret against the roadway’s edge. The people there screamed and some of them froze and still more folk pushed on from the northern bank, and then the central part of the roadway slowly dipped beneath the gray water as the people behind forced more fugitives onto the vanished drawbridge which sank even lower.

„Oh Jesus,” Sharpe said. He could see the first people being swept away. He could hear the shrieks.

„God save Ireland,” Harper said again and made the sign of the cross.

The central hundred feet of the bridge were now under water. Those hundred feet had been swept clear of people, but more were being forced into the gap that suddenly churned white as the drawbridge was sheared away from the rest of the bridge by the river’s pressure.