Clive, who had now only the two young subalterns serving under him, worked indefatigably. His coolness and confidence of bearing kept up the courage of his little garrison, and every night, when darkness hid them from the view of the enemy's sharpshooters, the men laboured to prepare for the impending attack. Works were thrown up inside the fort, to command the breach. Two deep trenches were dug, one behind the other; the one close to the wall, the other some distance farther back. These trenches were filled with sharp iron three-pointed spikes, and palisades erected extending from the ends of the ditches to the ramparts, and a house pulled down in the rear to the height of a breastwork, behind which the garrison could fire at the assailants, as they endeavoured to cross the ditches.
One of the three field pieces Clive had brought with him he mounted on a tower, flanking the breach outside. Two he held in reserve, and placed two small guns, which he had found in the fort when he took it, on the flat roof of a house in the fort commanding the inside of the breach.
From the roofs of some of the houses around the fort the besiegers beheld the progress of these defences; and Riza Sahib feared, in spite of his enormously superior numbers, to run the risk of a repulse. He knew that the amount of provisions which Clive had stored was not large, and thinking that famine would inevitably compel his surrender, shrank from incurring the risk of disheartening his army, by the slaughter which an unsuccessful attempt to carry the place must entail. He determined, at any rate, to increase the probability of success, and utilize his superior forces, by making an assault at two points, simultaneously. He therefore erected a battery on the southwest, and began to effect a breach on that side, also.
Clive, on his part, had been busy endeavouring to obtain assistance. His native emissaries, penetrating the enemy's lines, carried the news of the situation of affairs in the fort to Madras, Fort Saint David, and Trichinopoli. At Madras a few fresh troops had arrived from England, and Mr. Saunders, feeling that Clive must be relieved at all cost, however defenceless the state of Madras might be, despatched, on the 20th of October, a hundred Europeans and a hundred Sepoys, under Lieutenant Innis. These, after three days' marching, arrived at Trivatoor, twenty-two miles from Arcot.
Riza Sahib had heard of his approach; and sent a large body of troops, with two guns, to attack him. The contest was too unequal. Had the British force been provided with field pieces, they might have gained the day; but, after fighting with great bravery, they were forced to fall back; with a loss of twenty English and two officers killed and many more wounded, while the Sepoys suffered equally severely.
One of Clive's messengers reached Murari Reo, the Mahratta chief of Gutti. This man was a ferocious free-booting chief, daring and brave himself, and admiring those qualities in others. Hitherto, his alliance with Muhammud Ali was little more than nominal, for he had dreaded bringing upon himself the vengeance of Chunda Sahib and the French, whose ultimate success in the strife appeared certain. Clive's march upon Arcot, and the heroic defence which the handful of men there were opposing to overwhelming numbers, excited his highest admiration. As he afterwards said, he had never before believed that the English could fight, and when Clive's messenger reached him, he at once sent back a promise of assistance.
Riza Sahib learned, almost as soon as Clive himself, that the Mahrattas were on the move. The prospects of his communications being harassed, by these daring horsemen, filled him with anxiety. Murari Reo was encamped, with six thousand men, at a spot thirty miles to the west of Arcot; and he might, at any moment, swoop down upon the besiegers. Although, therefore, Riza Sahib had for six days been at work effecting a new breach, which was now nearly open to assault, he sent on the 30th of October a flag of truce, with an offer to Clive of terms, if he would surrender Arcot.
The garrison were to be allowed to march out with their arms and baggage, while to Clive himself he offered a large sum of money. In case of refusal, he threatened to storm the fort, and put all its defenders to the sword. Clive returned a defiant refusal, and the guns again opened on the second breach.
On the 9th of November, the Mahrattas began to show themselves in the neighbourhood of the besieging army. The force under Lieutenant Innis had been reinforced, and was now under the command of Captain Kilpatrick, who had a hundred and fifty English troops, with four field guns. This was now advancing.
Four days later the new breach had attained a width of thirty yards, but Clive had prepared defences in the rear, similar to those at the other breach; and the difficulties of the besiegers would here be much greater, as the ditch was not fordable.