On the 2nd of May, the batteries opened on the wall of the fort, near its northwest angle; and so heavy was their fire that, by the evening of the 3rd, a breach of sixty yards long was effected. General Harris determined to assault on the following day. General Baird, who had, for four years, been a prisoner in Seringapatam, volunteered to lead the assault; and before daybreak 4,376 men took their places in the advance trenches, where they lay down. It was determined that the assault should not be made until one o'clock, at which time Tippoo's troops, anticipating no attack, would be taking their food, and resting during the heat of the day. The troops who were to make the assault were divided into two columns which, after mounting the breach, were to turn right and left, fighting their way along the ramparts until they met at the other end. A powerful reserve, under Colonel Wellesley, was to support them after they had entered. When the signal was given, the troops leapt from the trenches and, covered by the fire of the artillery, which at the same moment opened on the ramparts, dashed across the river, scaled the breach, and, in six minutes from the firing of the signal gun, planted the British flag on its crest. Then the heads of the two columns at once started to fight their way along the ramparts. At first the resistance was slight. Surprised and panic stricken, the defenders of the strong works at this point offered but a feeble resistance. Some fled along the walls. Some ran down into the fort. Many threw themselves over the wall into the rocky bed of the river. The right column, in less than an hour, had won its way along the rampart to the eastern face of the fort; but the left column met with a desperate resistance, for as each point was carried, the enemy, constantly reinforced, made a fresh stand. Most of the officers who led the column were shot down, and so heavy was the fire that, several times, the advance was brought to a standstill. It was not until the right column, making their way along the wall to the assistance of their comrades, took them in the rear, that the Mysoreans entirely lost heart. Taken between two fires, they speedily became a disorganised mass. Many hundreds were shot down, either in the fort or as, pouring out through the river gate, they endeavoured to cross the ford and escape to the north.