A letter from Hallifax dated Oct 1 says, On Friday last [September 27] arrived here his Majesty's ship Viper, from Annapolis [Royal], having brought in with her three prizes, which she took near that place. On Sunday arrived his Majesty's ship Liverpool from a cruize, in which she has retaken several prizes (three of them, we hear, were West India ships) loaded with rum, sugar, &c. which had been taken by the American privateers.