The Honorable Congress have appointed a Committee of their body to transact such Continental business in this city as may be proper and necessary, the said Committee give this public notice, that they meet every day, and sit from ten to three o'clock, at their office in Front-street, where Messrs. Barclay and Mitchell lately dwelt, opposite to Messrs. Conyngham, Nesbit and Company. All persons charged with public letters for the Congrefs, Board of War, Marine, or other Committees, are desired to take notice hereof, as such letters will be opened or forwarded by the Committee as the case may require. —