An essay on the publick debts of this kingdom. [electronic resource] : Wherein the importance of discharging them is considered; the Provisions for that Purpose by the Sinking Funds, and the Progress therein hitherto made, are stated and explained; the Sufficiency of those Provisions are demonstrated; some general Mistakes about the Nature and Efficacy of this Expedient examined and removed; and the Progress of the Sinking Fund described and computed from Midsummer, 1727. To which is subjoined, An Enquiry into the General Convenience of reducing farther the Interest of our Publick Debts below 4 per Cent. per Annum. In a letter to a Member of the House of Commons.