Lot 30071737 (Jun. 30) London, England to Philadelphia Pa. via Boston, docketed folded cover with manuscript "B Sh:" postmark and matching "7dwt -16gr" rating, the "16" appears to be crossed out; file folds, Very Fine and early Boston ship letter.
Estimate $500 - 750.
During this period, letters sent from Boston to destinations outside of New England were rated not in local currency, but in pennyweight (dwt) and grains (gn) of coined silver (1 Sh sterling = 3 dW1; 1 dW1 = 24 gn). The rate of 7dwt, 16gr in silver was equal to the published rate in sterling for a single ship letter sent from Boston to Philadelphia, including a 16gr ship fee.