This foot note contained in document PJA09d020
5. Gordon is referring to various pre-1750 issues of bills of exchange that were known collectively as “old tenor.” In 1749 these bills could be exchanged for pounds sterling at the rate of approximately 10 to 1. In 1750, when Massachusetts returned to silver as the basis for its currency and the piece of eight as the measure of its value, the exchange rate fell to approximately 1:25 Massachusetts pounds lawful money per pound sterling (John J. McCusker, Money and Exchange in Europe and America, 1600–1775: A Handbook
, Chapel Hill, 1978, p. 133, 149; see also JA's second letter of 22 June to Vergennes, note 4
Cite web page as: Founding Families: Digital Editions of the Papers of the Winthrops and the Adamses, ed.C. James Taylor. Boston: Massachusetts Historical Society, 2007.