Moore no sooner heard that Napoleon was approaching than he perceived the necessity of an immediate retreat; and he commenced, accordingly, a most calamitous one through the naked mountains of Galicia, in which his troops displayed a most lamentable want of discipline. They ill-treated the inhabitants, straggled from their ranks, and in short lost the appearance of an army except when the trumpet warned them that they might expect the French to charge.
Leaving Chamartin on the morning of the 22nd of December Napoleon arrived at the foot of the Guadarrama as the infantry of his Guard was beginning to ascend it. The weather, which till then had been superb, had suddenly become terrible, and at the very moment when forced marches were to be performed, as it was necessary that they lose no time in coming up with the English.
Napoleon, seeing the infantry of his Guard accumulating at the entrance of the gorge, in which the gun-carriages were also crowded together, spurred his horse into a gallop, and gained the head of the column which he found detained by the hurricane. The peasants declared that it was impossible to pass without being exposed to the greatest dangers. This, however, was not sufficient to stop the conqueror of the Alps. He made the chasseurs of his Guard dismount, and ordered them to advance first in close column, conducted by guides. These bold fellows, marching at the head of the army, and trampling down the snow with their own feet and those of their horses, formed a beaten track for the troops who followed.
The Emperor himself climbed the mountain on foot, amidst the chasseurs of his Guard, merely leaning, when he felt fatigued, on the arm of General Savary. The cold, which was as severe as at Eylau, did not prevent him from crossing the Guadarrama. General Marbot, who accompanied Napoleon on the journey, says in his "Memoirs": "A furious snowstorm, with a fierce wind, made the passage of the mountains almost impracticable. Men and horses were hurled over precipices. The leading battalions had actually begun to retreat; but Napoleon was resolved to overtake the English at all cost. He spoke to the men, and ordered that the members of each section should hold one another by the arm. The cavalry, dismounting, did the same. The staff was formed in similar fashion, the Emperor between Lannes and Duroc, we following with locked arms; and so, in spite of wind, snow and ice, we proceeded, though it took us four hours to reach the top. Half way up the marshals and generals, who wore jackboots, could go no farther. Napoleon, therefore, got hoisted on to a gun, and bestrode it; the marshals and generals did the same, and in this grotesque order they reached the convent at the summit. There the troops were rested and wine served out. The descent though awkward, was better."
Napoleon spent the night in a miserable post-house in the little village of Espinar. On the mules laden with his baggage had been brought the wherewithal to serve him with supper, and which he shared with his officers, cheerfully conversing with them on that series of extraordinary adventures which had commenced at the school of Brienne—to end, he knew not where!
Next day the Emperor proceeded with his Guard; but the infantry advanced with difficulty and the artillery could not stir owing to the frightful quagmires. The stragglers and baggage came up slowly while Napoleon, anxious to meet the fleeing English troops, pushed on with his advance guard and with his chasseurs until Benevento was reached. Here he came up with his own troops in pursuit of Moore at Benevento, on the 29th of December, and enjoyed for a moment, from his headquarters established there, the spectacle of the English army in full retreat.
The French columns seemed to rival each other in their efforts to overtake the enemy. In their precipitation the English abandoned their sick, hamstrung their horses, when unable to keep up with them, and destroyed the greater part of their ammunition and baggage.
Marshal Soult, who had taken another road, was much nearer the enemy. His orders to follow the English intermission were difficult of accomplishing as the mud was deep and the soldiers sank up to their knees.
Napoleon now decided that Moore was no longer worthy of his own attention and intrusted the consummation of his ruin to Soult, who was ordered to pursue the English to the last extremity, and "with his sword at their loins." He therefore set out at once, his troops marching past the Emperor.