Treachery, as the French afterwards said, enabled him to do this. One of their artillery officers, according to French accounts, had a quarrel with the Governor, deserted and sold the secret of the passage for a large sum to Admiral Watson. He sent the money, so the story proceeds, to help his father in France, an aged and poor man, only, however, to receive back again the price of his treason, together with a bitter letter of reproach on the receipt of which the traitor hanged himself. On the other hand, Dr. Ives, on board the flagship, says nothing of any traitor. Admiral Watson in his dispatch simply says that he was delayed “until ... I could further discover by sounding a proper channel to pass through, which the pilots found out without being at the trouble of weighing any of the vessels.” There was hardly need for a traitor, and no need at all to pay for information with the masts of the sunken French vessels in the river standing up in the air, right across the bed of the Hooghly, for every man and boy in the English squadron to see. There was a traitor at Chandernagore, De Terraneau, an artillery officer; but he deserted to Clive’s camp, and, useful as his information proved to the land attack, he knew nothing about the river defences.
By midday on the 22nd all was in order for the squadron to go forward to the final fight. The tides now were running higher every day, and the next tide would probably serve. That afternoon Rear-Admiral Pocock (afterwards Sir George, and a very distinguished commander), the Second in Command of the East Indies squadron, came up the Hooghly rowing up from Calcutta in his barge. He had hurried up to join, in the hope of being in time to see something of the fighting. He had left his flagship, the _Cumberland_, at Balasore, unable to enter the river owing to the same low tides that had during the past few days delayed the _Kent_ and her two consorts in approaching Chandernagore. With Admiral Watson’s sanction, Pocock hoisted his flag for the battle on board the _Tyger_, to lead the line.
At dusk that evening, as soon as it could be done without observation by the enemy, boats crept ahead quietly and lashed lanterns to the masts of the sunken vessels, so screened as to show their light only in the direction of the English ships. By means of these the ships were to be guided before daybreak next morning between the obstacles and across the danger zone where the French had marked the range, past the heavy battery that overlooked the sunken ships.