Tracts, concerning the ancient and only true legal means of national defence, by a free militia [electronic resource] : I. The ancient common-law right of associating with the vicinage, in every county, district, or town, to support the civil magistrate in maintaining the peace. II. A general militia, acting by a well-regulated rotation, is the only safe means of defending a free people. III. Remarks concerning the trained bands of the city of London. IV. Hints of some general principles, which may be useful to military associations.