About twelve o'clock an order arrived for the troops to advance, leaving their baggage behind; and though it sounded warlike, yet we did not expect to come in contact with the enemy, at all events, on that day. But, as we moved forward, the symptoms of their immediate presence kept gradually increasing; for we presently met a cart-load of wounded Belgians; and, after passing through Genappe, the distant sound of a solitary gun struck on the listening ear. But all doubt on the subject was quickly removed; for, on ascending the rising ground, where stands the village of Quatre Bras, we saw a considerable plain in our front, flanked on each side by a wood; and on another acclivity beyond, we could perceive the enemy descending towards us, in most imposing numbers.

Quatre Bras, at that time, consisted of only three or four houses; and, as its name betokens, I believe, stood at the junction of four roads; on one of which we were moving; a second, inclined to the right; a third, in the same degree, to the left; and the fourth, I conclude, must have gone backwards; but, as I had not an eye in that direction, I did not see it.

The village was occupied by some Belgians, under the Prince of Orange, who had an advanced post in a large farm-house, at the foot of the road, which inclined to the right; and a part of his division, also, occupied the wood on the same side.

Lord Wellington, I believe, after leaving us at Waterloo, galloped on to the Prussian position at Ligny, where he had an interview with Blucher, in which they concerted measures for their mutual co-operation. When we arrived at Quatre Bras, however, we found him in a field near the Belgian outpost; and the enemy's guns were just beginning to play upon the spot where he stood, surrounded by a numerous staff.

We halted for a moment on the brow of the hill; and as Sir Andrew Barnard galloped forward to the head-quarter group, I followed, to be in readiness to convey any orders to the battalion. The moment we approached, Lord Fitzroy Somerset, separating himself from the duke, said, "Barnard, you are wanted instantly; take your battalion and endeavour to get possession of that village," pointing to one on the face of the rising ground, down which the enemy were moving; "but if you cannot do that, secure that wood on the left, and keep the road open for communication with the Prussians." We instantly moved in the given direction; but, ere we had got half-way to the village, we had the mortification to see the enemy throw such a force into it, as rendered any attempt to retake it, with our numbers, utterly hopeless; and as another strong body of them were hastening towards the wood, which was the second object pointed out to us, we immediately brought them to action, and secured it. In moving to that point, one of our men went raving mad, from excessive heat. The poor fellow cut a few extraordinary capers, and died in the course of a few minutes.

While our battalion-reserve occupied the front of the wood, our skirmishers lined the side of the road, which was the Prussian line of communication. The road itself, however, was crossed by such a shower of balls, that none but a desperate traveller would have undertaken a journey on it. We were presently reinforced by a small battalion of foreign light troops, with whose assistance we were in hopes to have driven the enemy a little further from it; but they were a raw body of men, who had never before been under fire; and, as they could not be prevailed upon to join our skirmishers, we could make no use of them whatever. Their conduct, in fact, was an exact representation of Mathews's ludicrous one of the American militia, for Sir Andrew Barnard repeatedly pointed out to them which was the French, and which our side; and, after explaining that they were not to fire a shot until they joined our skirmishers, the word "March!" was given; but march, to them, was always the signal to fire, for they stood fast, and began blazing away, chiefly at our skirmishers too; the officers commanding whom were every time sending back to say that we were shooting them; until we were, at last, obliged to be satisfied with whatever advantages their appearance could give, as even that was of some consequence, where troops were so scarce.

Buonaparte's attack on the Prussians had already commenced, and the fire of artillery and musketry, in that direction, was tremendous; but the intervening higher ground prevented us from seeing any part of it.

The plain to our right, which we had just quitted, had, likewise, become the scene of a sanguinary and unequal contest. Our division, after we left it, deployed into line, and, in advancing, met and routed the French infantry; but, in following up their advantage, they encountered a furious charge of cavalry, and were obliged to throw themselves into squares to receive it. With the exception of one regiment, however, which had two companies cut to pieces, they were not only successful in resisting the attack, but made awful havock in the enemy's ranks, who, nevertheless, continued their forward career, and went sweeping past them, like a whirlwind, up to the village of Quatre Bras, to the confusion and consternation of the numerous useless appendages of our army, who were there assembled, waiting the result of the battle.

The forward movement of the enemy's cavalry gave their infantry time to rally; and, strongly reinforced with fresh troops, they again advanced to the attack. This was a crisis in which, according to Buonaparte's theory, the victory was theirs, by all the rules of war, for they held superior numbers, both before and behind us; but the gallant old Picton, who had been trained in a different school, did not choose to confine himself to rules in those matters; despising the force in his rear, he advanced, charged, and routed those in his front, which created such a panic among the others, that they galloped back through the intervals in his division, with no other object in view but their own safety. After this desperate conflict, the firing, on both sides, lulled almost to a calm for nearly an hour, while each was busy in renewing their order of battle. The Duke of Brunswick had been killed early in the action, endeavouring to rally his young troops, who were unable to withstand the impetuosity of the French; and, as we had no other cavalry force in the field, the few British infantry regiments present, having to bear the full brunt of the enemy's superior force of both arms, were now considerably reduced in numbers.

The battle, on the side of the Prussians, still continued to rage in an unceasing roar of artillery. About four, in the afternoon, a troop of their dragoons came, as a patrole, to inquire how it fared with us, and told us, in passing, that they still maintained their position. Their day, however, was still to be decided, and, indeed, for that matter, so was our own; for, although the firing, for the moment, had nearly ceased, I had not yet clearly made up my mind which side had been the offensive, which the defensive, or which the winning. I had merely the satisfaction of knowing that we had not lost it; for we had met fairly in the middle of a field, (or, rather unfairly, considering that they had two to one,) and, after the scramble was over, our division still held the ground they fought on. All doubts on the subject, however, began to be removed about five o'clock. The enemy's artillery once more opened; and, on running to the brow of the hill, to ascertain the cause, we perceived our old light-division general, Count Alten, at the head of a fresh British division, moving gallantly down the road towards us. It was, indeed, a joyful sight; for, as already mentioned, our division had suffered so severely that we could not help looking forward to a renewal of the action, with such a disparity of force, with considerable anxiety; but this reinforcement gave us new life, and, as soon as they came near enough to afford support, we commenced the offensive, and, driving in the skirmishers opposed to us, succeeded in gaining a considerable portion of the position originally occupied by the enemy, when darkness obliged us to desist. In justice to the foreign battalion, which had been all day attached to us, I must say that, in this last movement, they joined us cordially, and behaved exceedingly well. They had a very gallant young fellow at their head; and their conduct, in the earlier part of the day, can, therefore, only be ascribed to its being their first appearance on such a stage.