Wellington, on his part, followed slowly, and his army took up a position between Canizal and Castrejon, thereby covering the roads from Toro and Tordesillas, the only points at which the French could cross the river. The reports of the spies all agreed that the former was the place at which the crossing would be made.

On the 16th of July an officer rode into Canizal, at headlong pace, with the news that a reconnoitering party had crossed the Douro that morning near Tordesillas, and had found that place deserted, except by a garrison; and an hour later the news came in that three divisions of the enemy were already across the river at Toro. Five minutes later the Scudamores were on horseback, carrying orders that the whole of the army, with the exception of the fourth and light divisions, which were on the Trabancos, under General Cotton, were to concentrate at Canizal that night. By the morning the movement was accomplished.

The day wore on in somewhat anxious expectation, and towards afternoon Wellington, accompanied by Lord Beresford, and escorted by Alten's, Bock's and Le Marchant's brigades of cavalry, started to make a reconnaissance of the enemy's movements. Caution was needed for the advance, as it was quite uncertain whether the French were pushing on through the open country towards Canizal, or whether they were following the direct road from Toro to Salamanca. Evening closed in, but no signs of the French army were seen, and the party halted about six miles from Toro, and small parties of cavalry were despatched right and left to scour the country, and find out where the enemy had gone.

"It's very strange where the French can have got to," was the remark made, for the fiftieth time among the staff.

The detached parties returned, bringing no news whatever, and Lord Wellington again advanced slowly and cautiously towards Toro. Small parties were pushed on ahead, and presently an officer rode back with the news that he had been as far as the river, and that not a Frenchman was to be seen. It was too late to do any more, and they remained in uncertainty whether the enemy had recrossed the river after making a demonstration, or whether they had marched to their right, so as to make a circuit, and throw themselves between Ciudad Rodrigo and Salamanca, upon the line of communication of the British army.

Lord Wellington, with his staff, took possession of a deserted farm-house, the cavalry picketed their horses round it, and the Scudamores, who had been more than twenty-four hours in the saddle, wrapped themselves in their cloaks, and stretching themselves on the floor, were soon asleep. Just at midnight the sound of a horse's footfall approaching at a gallop was heard, and an officer, who had ridden, without drawing rein, from Canizal, dashed up to the farm.

Five minutes later the whole party were in the saddle again. The news was important, indeed. Marmont had drawn his whole army back across the Toro on the night of the 16th, had marched to Tordesillas, crossed there, and in the afternoon, after a march of fifty miles, had fallen upon Cotton's outposts, and driven them across the Trabancos.

Not a moment's time was lost by Wellington after he received the news; but, unfortunately, six precious hours had already been wasted, owing to the despatches not having reached him at Canizal. With the three brigades of cavalry he set off at once towards Alaejos, while an officer was despatched to Canizal, to order the fifth division to march with all speed to Torrecilla de la Orden, six miles in the rear of Cotton's position at Castrejon.

Four hours' riding brought them to Alaejos, where a halt for two or three hours was ordered, to rest the weary horses and men. Soon after daybreak, however, all thought of sleep was banished by the roar of artillery, which told that Marmont was pressing hard upon Cotton's troops. "To horse!" was the cry, and Lords Wellington and Beresford, with their staff, rode off at full speed towards the scene of action, with the cavalry following hard upon their heels. An hour's ride brought them to the ground. Not much could be seen, for the country was undulating and bare, like the Brighton Downs, and each depression was full of the white morning mist, which wreathed and tossed fantastically from the effects of the discharges of firearms, the movements of masses of men, and the charges of cavalry hidden within it. Upon a crest near at hand were a couple of British guns, with a small escort of horse.

Suddenly, from the mist below, a party of some fifty French horsemen dashed out and made for the guns. The supporting squadron, surprised by the suddenness of the attack, broke and fled; the French followed hard upon them, and just as Lord Wellington, with his staff, gained the crest, pursuers and pursued came upon them, and in pell-mell confusion the whole were borne down to the bottom of the hill. For a few minutes it was a wild mélée. Lords Wellington, Beresford, and their staff, with their swords drawn, were in the midst of the fight, and friends and foes were mingled together, when the leading squadrons of the cavalry from Alaejos came thundering down, and very few of the Frenchmen who had made that gallant charge escaped to tell the tale.