Here the fight was renewed with great stubbornness, and continued for two hours longer, when Schomberg, with the loss of two hundred men, forced the position, and the dragoons retired with the loss of one-fourth their number, bearing away the body of their leader, mortally wounded, and renewed the contest on the other side of the river. Schomberg immediately commenced to cross, and the king, apprised of the state of affairs here, sent Sarsfield, with sixty dragoons and a piece of artillery, to oppose him; but these succors only arrived in time to see the defenders driven from their intrenchments, and the troops of Schomberg drawn out on the southern bank to receive them.

All further attempts to check the progress of the assailants were now futile; the dragoons retired on their supports; the gun brought down by Sarsfield got "bogged," and had to be abandoned, and Schomberg, his artillery being got over, deployed by his right, on the outer side of the marsh, to turn the left of the king's army. He had, however, scarcely got clear of the river, when the troops of de Lausun appeared on the inner side of the marsh to oppose him. The force of the latter was 6,000 men, within support of a reserve of 3,000; it was fresh, finely appointed, and the marsh at this place was narrow and practicable to horse and foot; but he showed no disposition to engage, although Schomberg halted and drew up to offer him battle. After some time the troops on both sides were put in motion, Schomberg still moving by his right, and de Lausun by his left in the same direction, the marsh gradually widening round towards the rear of Donore, until nearly a mile intervened, when an engagement became impracticable, and the Irish left was flanked.

In the mean time, King James, seeing that Count Schomberg had crossed the river, believed that the other division of William's army would also move in the same direction, and that the entire battle would be finally transferred to his left. He therefore determined to withdraw his own right and centre from the river, to the support of de Lausun, and with this intention he now proceeded to his right. There seeing that William's left and centre were still drawn up on the opposite bank, and being opposed in his design by Tyrconnell, he returned to his left, where Count Schomberg and de Lausun were still confronting each other. Posting his reserves on the right of the latter, and riding up to him, he ordered him to charge the enemy across the intervening ground; but the order was disobeyed, although Schomberg halted again and formed to invite an action. In this state of perplexity the king rode back to the reserves, placed the infantry at the edge of the marsh, supported on each side by his cavalry, with the foot dragoons filling up the intervals, and approaching M. de la Hoquette, "whispered him" to lead on the French infantry. The latter was about to comply with this request, when he was checked by de Lausun; at this time, Sarsfield and Maxwell, who had been out inspecting the ground in front, returned, and pronounced it impracticable to cavalry, it being traversed by two double ditches with a rivulet flowing between them. So the king was convinced, and de Lausun was relieved from his importunity. In this manner the two wings continued to manoeuvre the situation each moment growing more critical, as Schomberg neared the end of the marsh, where the road turned towards Duleek, and led on to the capital.

Thus, through some motive of de Lausun, never after explained, and through the absence of control in the unfortunate king, never forgiven, the French auxiliaries, and with them the Irish reserve,—a body of 3,000 men,—were neutralized; the Irish left was completely turned, and the remainder of the army, not exceeding 11,000, was left to contend with 30,000 under William and the Duke of Schomberg.

In the mean time a considerable change had taken place in William's left and centre. The Duke of Schomberg had discovered another ford in the direction of Slane, and when that pass was carried, had moved by his right to avail himself of the advantages it offered, while William had moved by his left somewhat nearer to the town of Drogheda. These changes necessitated corresponding movements in the Irish line. A greater extension was the consequence, and some regiments of its rear were extended to oppose the Duke of Schomberg; but still they offered a good front, and awaited the enemy in confidence.

It was well on to noon, and the tide was on the return, when the firing ceased on Duke Schomberg's front, and the Dutch Guards, accompanied by their band, detached themselves from the main body and moved down to the river. Here the music of the band ceased; the guards formed in compacted columns, twenty abreast, and commenced the passage of the river in the face of a well-directed fire.[29] When they had all got below the level of their own artillery, its fire was again directed against the Irish intrenchments, and compelled the men there to lie close in their works, until the guards got beyond the mid current and began to ascend on the opposite side, when they quitted their defences, and advanced into the river to meet them, and, as they closed, Major Arthur, of the Irish Guards, singling out the leader of the enemy, passed his pike through his body. This stimulated his men to action; a desperate conflict ensued; the Dutch Guards were held in check for a considerable time, and many fell on both sides, and were trampled beneath the current.

The Dutch Guards were the household troops of the Prince of Orange; were fighting under his eye, and formed a compact body of five thousand men, while the Irish were mostly raw levies, inferior in number, and indifferently armed with pikes and muskets. The result was doubtful for some time, until Major Arthur was wounded and conveyed to the rear; disheartened and borne back by the weight of numbers, his troops gradually gave ground; and the Dutch troops advanced and effected a landing. As they reached the firm ground above the river, they were charged by the dragoons of Clare and Dungan, and wavered; but Lord Dungan being slain, the dragoons became panic-stricken and retreated, nor could they again be brought to the charge. In this state of indecision the Dutch renewed their assault, and established a position in the broken ground behind the Irish line. The position was a strong one, and at once laid bare the intrenchments on the river, while it afforded a protection against the Irish cavalry; and here they remained during the succeeding events of the day, suffering severely, but defying every attempt to dislodge them.

William, who witnessed this, felt deep concern for the fate of his household troops. They had accompanied him in all his campaigns, and his care for them, in peace and war, was that of a patriarch for his household. From his point of view, their condition was now perilous in the highest degree, they being surrounded by the enemy on all sides, and in danger of total destruction before relief could reach them. To him, the movements of Schomberg, always slow and measured, seemed now painfully so; and, suspending his advance against the Irish right, he rode down to the centre, to precipitate the troops forming there for the relief of his famous guards. Two regiments of the Huguenot troops and one of British infantry were immediately formed, and, under the leadership of Caillemotte, commenced the passage of the river.

Hamilton, from the right of the Irish line, had followed these events with a feeling akin to that of William. He believed, like him, that the fate of the Dutch troops was sealed, could the reinforcements of the enemy be held in check or repulsed; but he also saw that the intrenchments at the centre were partially abandoned from the effects of the enemy's fire on their rear, and that all now depended on intrepid action. He therefore detached two regiments of infantry from the right, to march close by the river, and throw themselves before Caillemotte, while he hastened himself, by a more circuitous route, with the cavalry, to sustain them.

The troops of Caillemotte advanced rapidly to the mid-current, where they were met as the Dutch Guards had been, and, like them, were forcing their way against the Irish infantry, when Hamilton reached the scene of action. As he appeared, the infantry opened to the right and left to make way, and, with unchecked impulse, he rushed to the onset. The effect was instantaneous. In a moment, the enemy were helplessly broken, trampled, and dispersed. Caillemotte, two colonels, and two lieutenant-colonels were slain, more than half his command were either killed or wounded, and the remainder fled to the opposite side, pursued by the victorious cavalry. As they pressed the fugitives up to their lines, the Danish horse were precipitated against them, but were instantly broken, hurled back in confusion, and closely pressed on the columns now forming under the Duke of Schomberg. Rushing on wildly, and crying out "Horse! horse!" in great alarm, they created a panic, which was near ending in a total rout; when William again appeared among them, restored order in the ranks, and the Irish cavalry leisurely retired.