What does it mean to swear loyalty when the very basis of power is in dispute? In this fiery English constitutional law treatise, Charles Leslie confronts the unsettled settlement of the Glorious Revolution and the sovereign authority of the prince with unsparing clarity. Arguments crackle on every page. Cast as a letter to the Reverend William Higden, this early modern political pamphlet attacks prevailing justifications for the new regime and probes the lawfulness of taking the contested oaths, a central flashpoint in the oaths of allegiance debate, making vivid the anxieties of early eighteenth century England and the tangled relationship between the English constitution and monarchy. Long recognised among English constitutional history classics, this volume stands at the crossroads of theology, law, and political theory. It speaks directly to readers fascinated by Glorious Revolution politics, and serves as a primary-source touchstone for legal history students and for political theory scholars exploring how conscience, obedience, and legitimacy were argued in practice. Republished as part of the Charles Leslie constitutional writings within any serious classic political treatise collection, it offers a rare window into the rhetoric, logic, and moral passion of its age. Out of print for decades and now republished by Alpha Editions, this volume has been restored for today's and future generations. More than a reprint - a collector's item and a cultural treasure.