Lord have mercie upon us, or, A plaine discovrse declaring that the plague of warre which now wasts this nation tooke its beginning in and from the citie of London : and from thence also hath received both increase and nourishment to the infection and destruction of the rest of the kingdome : written Vpon occasion of His Majesties proclamation of seventeenth of Iuly, prohibiting all entercourse of trade betweene the cities of London and other parts of his dominions.