This morning an express arrived from Norfolk, with advice that mr. Hamilton of Nansemond's brig had just returned from Boston, with seven officers from General [Thomas] Gage to assist lord Dunmore in his operations against this colony, in return for the very friendly supply of provisions he received by said vessel; and we learn that his lordship has got 13 field pieces on board the ship William, for the use of his army at Gosport, which, it is imagined, he intends soon to put in motion.