The fleet under Com. Chauncey, consisting of about 15 sail, and having it is said nearly 3,000 troops on board, arrived at Niagara the 27th ult. and proceeded the next day with a detachment towards the head of the lake on an expedition. The state in last week's paper of the arrival of the fleet, was premature, as will be seen by a reference to the Buffalo article of July 27.
A letter from Watertown, July 22d, to Mr. Cook, mentions the capture on Monday last, of 15 bateaux on the river St. Lawrence, loaded with provisions and military stores, and one gun-boat, which had been carried into Cranberry creek, about 40 miles above Ogdensburg, on the American side. The prisoners, 67 in number, had been sent to Sacket's Harbor. That the British had sent 250 men and three gun-boats from Prescott to recover their boats, & c.; That they had attacked our men, who repulsed the assailants and retained their post, and had sent an express to the harbor for succor, and that Com., Chauncey had put to sea with his whole force, and that Gen. Lewis had sent 300 mounted men to their relief, which were supposed to have arrived on the evening of the 21st. - Albany Gazette.