This study seeks to identify the "loci" motifs in the federal thought of two eminent Puritans, William Perkins and John Preston, and thereby present Puritan "loci" federalism as a biblically sanctioned alternative to the historical method. It reinterprets the diversity within the Reformed Federal thought based on a methodological distinction of loci/history rather than a dogmatic division of grace/ethics.
Introduction: interpretations of puritan federalism - two tradition theory; single tradition theory; diversity within unity theory; evaluation; Loci approach. Loci federalism of William Perkins: system and history in federalism; two biblical patterns of federalism; William Perkins and English federalism; covenant and Ordo Salutis; decree and covenant; unity of law and grace ramism and covenant. System and piety in William Perkins: piety and system; covenant and casuistry; conscience and decree; conscience and covenant; Loci federalism and casuistry; covenant and sacraments; immanence of Ex Opere Operato; transcendence of ex Opere Operantis; Operato-in-Operantis; covenant and assurance; transcendence of faith immanence of assurance; covenant and law; transcendence of grace; immanence of law; covenant and preparation; transcendence of effectual call; immanence of general call. federal thought of John Preston - a flowering of Perkinsian synthesis: system and history; Perkins and Preston covenant as outward means of decree covenant and Ordo Salutis; predestination and preparation; double decree; gospel and decree; generality of gospel call; bilateral covenant; grace and law; summary of Preston's federal thought. Conclusion; bibliography.