That night the French Army fled through the woods that lay to the south of Salamanca. As they ran, the soldiers looked up and were amazed to see flights of angels descending through the dark trees. The angels shone with a blinding light. Their wings were as white as swans’ wings and their robes were the shifting colours of mother-of-pearl, fish scales or skies before thunder. In their hands they held flaming lances and their eyes blazed with a divine fury. They flew through the trees with astonishing rapidity and brandished their lances in the faces of the French.

Many of the soldiers were stricken with such terror that they turned and ran back towards the city – towards the pursuing British Army. Most were too amazed to do any thing but stand and stare. One man, braver and more resolute than the rest, tried to understand what was happening. It seemed to him highly unlikely that Heaven should suddenly have allied itself with France’s enemies; after all such a thing had not been heard of since Old Testament times. He noticed that though the angels threatened the soldiers with their lances, they did not attack them. He waited until one of the angels swooped down towards him and then he plunged his sabre into it. The sabre encountered no resistance – nothing but empty air. Nor did the angel exhibit any signs of hurt or shock. Immediately the Frenchman called out to his compatriots that there was no reason to be afraid; these were nothing but illusions produced by Wellington’s magician; they could not harm them.

The French soldiers continued along the road, pursued by the phantom angels. As they came out of the trees they found themselves on the bank of the River Tormes. An ancient bridge crossed the river, leading into the town of Alba de Tormes. By an error on the part of one of Lord Wellington’s allies this bridge had been left entirely unguarded. The French crossed over and escaped through the town.

Some hours later, shortly after dawn, Lord Wellington rode wearily across the bridge at Alba de Tormes. With him were three other gentlemen: Lieutenant-Colonel De Lancey who was the Army’s Deputy Quartermaster; a handsome young man called Fitzroy Somerset who was Lord Wellington’s Military Secretary; and Jonathan Strange. All of them were dusty and battle-stained and none of them had been to bed for some days. Nor was there much likelihood of their doing so soon since Wellington was determined to continue his pursuit of the fleeing French.