... SHIP NEIWS. PORTSMOUTH, APRIL rq.-Arrived the Swinger, 14 guns, Captain Wauchope, from P'lynotlth. On 111onday last she fell in with two French frigates, the Areathuse and Iphigenis, which had sailed from St. Maloes on the preceding day. On nearing them, one hoisted a Dutch ensign. and kept standing on to the Westward. In a short time the Uippon, 74, joined in the pur- suit, and in the course ...