But the king had doubly prevented him, first by laying his bridge so low that none of Tilly's shot could hurt it; for the bridge lay not above half a foot above the water's edge, by which means the king, who in that showed himself an excellent engineer, had secured it from any batteries to be made within the land, and the angle of the bank secured it from the remoter batteries on the other side, and the continual fire of the cannon and small shot beat the Imperialists from their station just against it, they having no works to cover them.
And in the second place, to secure his passage he sent over about 200 men, and after that 200 more, who had orders to cast up a large ravelin on the other bank, just where he designed to land his bridge. This was done with such expedition too, that it was finished before night, and in condition to receive all the shot of Tilly's great battery, and effectually covered his bridge. While this was doing the king on his side lays over his bridge. Both sides wrought hard all day and night, as if the spade, not the sword, had been to decide the controversy, and that he had got the victory whose trenches and batteries were first ready. In the meanwhile the cannon and musket bullets flew like hail, and made the service so hot that both sides had enough to do to make their men stand to their work. The king, in the hottest of it, animated his men by his presence, and Tilly, to give him his due, did the same; for the execution was so great, and so many officers killed, General Altringer wounded, and two sergeant-majors killed, that at last Tilly himself was obliged to expose himself, and to come up to the very face of our line to encourage his men, and give his necessary orders.
And here about one o'clock, much about the time that the king's brigade and works were finished, and just as they said he had ordered to fall on upon our ravelin with 3000 foot, was the brave old Tilly slain with a musket ball in the thigh. He was carried off to Ingolstadt, and lived some days after, but died of that wound the same day as the king had his horse shot under him at the siege of that town.
We made no question of passing the river here, having brought everything so forward, and with such extraordinary success; but we should have found it a very hot piece of work if Tilly had lived one day more, and, if I may give my opinion of it, having seen Tilly's battery and breastwork, in the face of which we must have passed the river, I must say that, whenever we had marched, if Tilly had fallen in with his horse and foot, placed in that trench, the whole army would have passed as much danger as in the face of a strong town in the storming a counterscarp. The king himself, when he saw with what judgment Tilly had prepared his works, and what danger he must have run, would often say that day's success was every way equal to the victory of Leipsic.
Tilly being hurt and carried off, as if the soul of the army had been lost, they began to draw off. The Duke of Bavaria took horse and rid away as if he had fled out of battle for his life.
The other generals, with a little more caution, as well as courage, drew off by degrees, sending their cannon and baggage away first, and leaving some to continue firing on the bank of the river, to conceal their retreat. The river preventing any intelligence, we knew nothing of the disaster befallen them; and the king, who looked for blows, having finished his bridge and ravelin, ordered to run a line with palisadoes to take in more ground on the bank of the river, to cover the first troops he should send over. This being finished the same night, the king sends over a party of his guards to relieve the men who were in the ravelin, and commanded 600 musketeers to man the new line out of the Scots brigade.
Early in the morning a small party of Scots, commanded by one Captain Forbes, of my Lord Reay's regiment, were sent out to learn something of the enemy, the king observing they had not fired all night; and while this party were abroad, the army stood in battalia; and my old friend Sir John Hepburn, whom of all men the king most depended upon for any desperate service, was ordered to pass the bridge with his brigade, and to draw up without the line, with command to advance as he found the horse, who were to second him, come over.
Sir John being passed without the trench, meets Captain Forbes with some prisoners, and the good news of the enemy's retreat. He sends him directly to the king, who was by this time at the head of his army, in full battalia, ready to follow his vanguard, expecting a hot day's work of it. Sir John sends messenger after messenger to the king, entreating him to give him orders to advance; but the king would not suffer him, for he was ever upon his guard, and would not venture a surprise; so the army continued on this side the Lech all day and the next night. In the morning the king sent for me, and ordered me to draw out 300 horse, and a colonel with 600 horse, and a colonel with 800 dragoons, and ordered us to enter the wood by three ways, but so as to be able to relieve one another; and then ordered Sir John Hepburn with his brigade to advance to the edge of the wood to secure our retreat, and at the same time commanded another brigade of foot to pass the bridge, if need were, to second Sir John Hepburn, so warily did this prudent general proceed.
We advanced with our horse into the Bavarian camp, which we found forsaken. The plunder of it was inconsiderable, for the exceeding caution the king had used gave them time to carry off all their baggage. We followed them three or four miles, and returned to our camp.
I confess I was most diverted that day with viewing the works which Tilly had cast up, and must own again that had he not been taken off we had met with as desperate a piece of work as ever was attempted. The next day the rest of the cavalry came up to us, commanded by Gustavus Horn, and the king and the whole army followed. We advanced through the heart of Bavaria, took Rain at the first summons, and several other small towns, and sat down before Augsburg.