The next morning dawned grey and overcast and the first drops of rain began to fall as the British and Portuguese troops tramped out along the road to the east, following the trail of Soult’s corps. Almost from the outset there was clear evidence of the desperate state of the enemy. The British encountered abandoned equipment, scattered along the side of the road. Backpacks, broken muskets, and then the less valuable spoils that had been carried away from Oporto, and the heavier items. In amongst the detritus lay the wounded who had been left behind.At first Arthur gave orders for the enemy injured to be carried back to the city for care alongside his own casualties, but soon there were too many of them to tend to and he cancelled his order with a heavy heart, knowing their likely fate if they fell into the hands of the local peasantry.

The Portuguese people had already suffered much under French occupation and now their torments increased as Soult’s retreating column pressed through their villages.The French soldiers were hungry and made free use of torture on any peasants they suspected of hiding food and drink. As Arthur’s soldiers marched along in the wake of the enemy column, squelching through the mud as they hunched down under the steady downpour, they came across frequent examples of the enemy’s cruelty. Bodies hung from trees. Mothers and infants had been bayoneted or shot in their hovels and young girls raped and left for dead. Villages had been burned so that faint columns of smoke and smouldering remains clearly marked the passage of Soult and his men. As he bore witness to these atrocities Arthur felt his heart grow heavy with a cold rage at the carnage endured by civilian bystanders of the war, and he vowed to do whatever he could to ensure that his own men did not follow the enemy’s example.

Occasionally the British came across the bodies of French stragglers upon whom the Portuguese had wreaked their revenge. The luckiest had been killed out of hand, but others had been gutted, or partially flayed, and one officer’s body had been discovered sawn in half, beside the bloodied blade of a tree-felling saw. In one village, during a brief lull in the rain, they came across a group of villagers standing round a circle of burning straw. In the middle a wounded Frenchman was screaming. Every time he tried to crawl out, the peasants drove him back inside the flames with their pitchforks, and threw more straw on to the fire. Before Oporto the British troops might have intervened to save the Frenchman, but they had seen enough of his comrades’ handiwork to spare him little more than a cold-hearted sideways glance as they marched by.