On the 15th and 16th, Marmont concentrated his troops between Toro and San Roman: two divisions crossed the bridge at Toro on the evening of the 16th, and Lord Wellington moved the allies that night to Fuente la Peña and Canizal, intending to concentrate them on the Guarena. But it was ascertained next day, that during the night the enemy had repassed the bridge, and destroyed it after them; then making forced marches to Tordesillas, which is six leagues above Toro, crossed again there, and early on the morning of the 18th were on the Trebancos. Marmont might well applaud himself both for the celerity and the skill of these movements: he had marched forty miles; had opened his communication with the army of the centre, which was then moving from Madrid to support him; and by advancing in force on Castrejon he endangered the light and 4th divisions, with Major-General Anson’s brigades of cavalry, which there had not been time for calling in. The enemy commenced a very heavy cannonade against the cavalry; they were scattered about in squadrons, and so escaped without much loss; and immediate measures had been taken to provide for their retreat and junction. The troops at Castrejon maintained their posts till the cavalry joined them; then they retired in perfect order to Tordesillas de la Orden, and thence to the Guarena, having the enemy’s whole army on their left flank or in their rear; and the French getting possession of the heights above that river, before the allies had crossed, brought forty guns to bear upon them, under the fire of which they joined the army on the left bank. Four streams which unite about a league below Canizal, form the Guarena: the French crossed at Castrillo, a little below the junction, and manifested an intention to press upon the left of the allies; with this view they endeavoured to occupy a ridge above Castrillo, but Lieutenant-General Cole’s division advanced to meet them with the bayonet; they gave way; the cavalry charged, General Carrier and between 300 and 400 men were made prisoners, and one gun taken. In the course of the day, the allies lost about 100 in killed, 400 wounded, and 50 prisoners; but the check which Marmont received made him more circumspect in his movements.