A letter from Edinburgh, containing a true and perfite relation of all the passages and proceedings of the late army, raised in Scotland by order of Parliament: for the prosecuting of the ends of the League and Covenant, concerning religion, libertie, and His Majesties lawfull authority, by the well-affected subjects of that kingdom, showing the progresse thereof, from the beginning of the engagement: unto the end of that unfortunate expedition. Written by an eye-witness, who was both an actor, and inspector of all mens carriages, in the march untill the deroute of the army. To a friend at London, for the better information of all those who desire to know the plain truth.