By letter from Boston, dated the 4th inst. we are informed, that the General [Thomas Gage] had refused payment for the cargo of 2200 barrels of flour on board the ship Charming Peggy, Capt. [Thomas] Dowman, from this port to Lisbon, formerly taken by the Mercury man of war, and carried into Boston. The General at first refused to deliver up even the ship, but on a second application, he informed Capt. Dowman, that he might proceed with the ship to any port he thought proper; however the Admiral [Samuel Graves] would not permit his departure, save to Great Britain, or the English West India Islands, and that he had cleared out the ship in ballast for Barbadoes, and only waited to procure hands to man the ship, which was very difficult to do.