The Straight-Line "jamaica" Datestamps Types J4-6. 1799 (16 Apr.) entire to Edinburgh, appearing to be an example of a Ship Letter charged half Packet rate under a 1799 Act, being 10d. half packet rate plus 1/4d. inland charge for a total of 2/2d., showing on reverse "jamaica/16 apr 99" J4 datestamp, the earliest recorded date of use, and London transit datestamp (25.5). Photo (Image1)

Est. £200-250

The Straight-Line "jamaica" Datestamps Types J4-6. 1799 (26 June) double rate entire letter to Glasgow, originally rated "1/8" deleted with an Inspectors Crown, re-rated "3/4", again deleted, and finally "4/10", showing on reverse superb "jamaica/26 june" J4 datestamp alongside arrival datestamp (20.9). Photoprovenance:. Robson Lowe, Bermuda January 1978 (Image1)

Est. £400-500

The Straight-Line "jamaica" Datestamps Types J4-6. 1799 (31 Dec.) entire letter from "Greenwall St. Davids" by "Packet" to London, rated "3/4" (2/- inward Packet plus 1/4d. inward charge from Falmouth to London) and showing, on reverse, "jamaica/jan 1 1800" J5 datestamp, possibly the first recorded date of use on the first day of the new century, and February arrival datestamp across join. Photo (Image1)

Est. £100-120