The next morning the allies occupied their old position at San Christoval, while the French took possession of Alba; whence the Spaniards had been withdrawn, without notice, to Wellington. The evening before, the British general had sent a despatch to the Spanish commander, saying that he feared that he should be unable to hold his position. The messenger was captured by the French cavalry; and Marmont, believing that Wellington was about to retreat, and fearing that he might escape him, determined to fight rather than wait for the arrival of the king. The French crossed the Tormes by the fords of Huerta and Alba, the British by other fords above Salamanca. This movement was performed while a terrible storm raged. Many men and horses of the 5th Dragoon Guards were killed by the lightning; while hundreds of the picketed horses broke their ropes, and galloped wildly about. [Illustration: Plan of the Forts and Operations round Salamanca.] The position of the British army in the morning was very similar to that occupied by a portion of it, when besieging the forts of Salamanca; extending from the ford of Santa Marta to the heights near the village of Arapiles. This line covered Salamanca; but it was open to Marmont to march round Wellington's right, and so cut his communications with Ciudad. During the night, Wellington heard that the French would be joined, in the course of two days, by twenty guns and 2000 cavalry; and resolved to retire before these came up, unless Marmont afforded him some opportunity of fighting to advantage. The latter, however, was too confident of victory to wait for the arrival of this reinforcement, still less for that of the king and, at daybreak, he took possession of a village close to the British, thereby showing that he was resolved to force on a battle. Near this were two detached hills, called the Arapiles or Hermanitos. They were steep and rugged. As the French were seen approaching, a Portuguese regiment was sent to seize them; and these gained the one nearest to them, while the French took possession of the second. The 7th division assailed the height first, and gained and captured half of it. Had Wellington now wished to retire, it would have been at once difficult and dangerous to attempt the movement. His line was a long one, and it would have been impossible to withdraw, without running the risk of being attacked while in movement, and driven back upon the Tormes. Ignorant of Marmont's precise intentions--for the main body of the French army was almost hidden in the woods--Wellington could only wait until their plans were developed. He therefore contented himself with placing the 4th division on a slope behind the village of Arapiles, which was held by the light companies of the Guards. The 5th and 6th divisions were massed behind the hill, where a deep depression hid them from the sight of the enemy.