A Letter from Dover, dated May 12, says, "This Morning Capt. Kelly sailed from hence for Calais, and from thence will proceed to Paris, in order, by Means of our Ambassador there, to procure the Release of his Ship, the Joseph, taken by Cunningham, and carried into Dunkirk. The Event of this will shew whether the French intend, or not, to give Encouragement to the Americans to carry in their Prizes into their Ports."

Many Letters received by Friday's Post from Dunkirk give authentic Advice, that more than one Privateer have sailed from that Port, and returned with some of our Ships which they had taken. If this Conduct is countenanced by the Court of Versailles, an immediate War between France and this Country will be the inevitable Consequence.

On Account of the Number of Captures of Vessels from Portugal, Insurance has risen greatly, consequently Wines will increase in Price, and what generally happens in the Country, treble the Advance will be laid on.