On arriving there Harry found that General Lake had left, six weeks before, and had encamped at Secundara where, on the 26th of August, despatches had been received from the Governor General, authorizing active operations against Scindia and his allies; and two days later the force halted on the Mahratta frontier, within sight of the mosque at Coel, where Perron was encamped.
Perron, a French officer in Scindia's service, commanded no less than forty-three thousand men, and four hundred and sixty-four guns. About half of these were with Scindia in the Deccan, and the force encamped at Coel numbered about twenty thousand.
Perron, an active and ambitious man, had assumed an almost independent position. A large grant of territory had been given him by Scindia, and in this he ruled with absolute authority and, had it not been for the interposition of the British, it is probable that he would, ere long, have assumed the position of an independent prince. Indeed, his army of partially disciplined men was more than a match for the whole force of Scindia.
At a short distance from Coel was the fortress of Alighur, which was considered to be almost impregnable. It was defended by a triple line of walls and fortifications, so that an enemy entering it would have to advance by a devious route from one gate to another, exposed all the time to a terrible artillery fire. It was almost surrounded by a swamp, and the only approach was along a narrow strip of firm ground, leading to the gate.
Early on the morning of the 29th, the British troops advanced to attack Perron's force; but it at once drew off, although the infantry were supported by twenty thousand horse. Believing that Alighur was impregnable, Perron left a strong force there under one of his officers, named Pedron, and marched with his army towards Agra.
On the 4th of September a storming party, commanded by Colonel Monson, left the British camp; and was accompanied by two batteries, each consisting of four eighteen-pounders. A portion of the defenders was posted on the strip of dry ground, outside the gate, where a battery with three guns had been mounted. Before daybreak, Colonel Monson moved forward, with two companies of the 76th Regiment. The enemy took the alarm before he reached their battery, and fled towards the gate, without waiting to discharge their guns.
Monson pressed after them, in the hope of being able to enter before the gate was shut; but he was too late. The entrance was raked by the guns on the walls, which opened with a destructive fire of grape. Ladders were applied to the walls, but these were manned by so strong a body of pikemen that it was found impossible to gain a footing. So bold were the defenders that, as the soldiers fell back, they ran down the ladders and pursued them hotly; but were soon beaten off.
A six pounder was brought up to burst open the gate, but its fire did but little damage; and a twelve pounder was then employed. The gates yielded, and the storming party rushed in. But during the twenty minutes that had elapsed, between the guns opening fire and the time at which the gate yielded, the troops had been exposed to a terrible fire, both of grape and musketry. Colonel Monson was wounded, and the loss was heavy.
The second gate was forced with comparatively little difficulty, although a terrible fire of artillery and musketry was kept up, from the walls on either side of the road, and from the bastion commanding it. The assailants pressed so hotly, upon the defenders of the second gate, that they gained the third before the enemy had time to close it.
But another and stronger gate had still to be passed, and here a desperate stand was made. The troops were obliged to take shelter, close to the wall, until the twelve pounder was brought up. It was of little avail, for the artillerymen were shot down as soon as they endeavoured to work it. At length, two or three officers gathered a party, and made a rush at the wicket gate. Half a dozen muskets were discharged, together, at the lock; and the gate at once gave way.