A full and true relation of a new hellish Popish plot in Ireland, carried on by the papists in the province of Munster : with the manner how they would have possessed themselves of that strong city of Limerick, and the castle thereof, in order to the receiving French forces in the great River Shanon, for their landing there : express'd in a letter from a friend verbatim, dated in Dublin this 6th of December 1679.