(Boston to Newport R.I., June 16, 1746) "Bo 1/2" Massachusetts Old Tenor. Manuscript postmark and rate on 1744 folded letter to Newport, R.I., Very Fine, the use of Massachusetts Old Tenor currency beginning in 1690 was due to the scarcity of British shillings and pence, it was initially valued at a 25% discount to British currency but continued to lose value through 1754, during the period this letter was sent (1735-48), British postage was converted using an inflation factor of 3.5x, which in this case equates to 1sh2p in local currency (4p British for up to 60 miles x 3.5 = 14p, or 1sh2p),

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