The American frigate Oliver Cromwell ² took three prizes last week, one a Guineaman with 300 slaves, one a ship from London. The ship Champion, belonging to Bristol, is taken at Tobago; she was going from one bay to another, and had 150 hogsheads of sugar and 22 bales of cotton on board. They are now discharging her at St. Lucia. We do not find that the Americans are so much protected any where as at Martinque and St. Lucia, which is under the same government. Were their trade and communication cut off there, which two frigates would in a great measure do, no step the Ministry could take would distress them more; it is from thence they are supplied with every thing they stand in need of, not only arms and ammunition, but men. A great many experienced Officers are gone to the Continent; and we have numbers of privateers that are manned with French; some have only one American, and that perhaps a landsman, just to cloak their piratical proceedings. There are now about 20 sail of English ships in Martinique. Negroes are cheaper there than in Africa, and provisions than in Ireland.