Postage stamp prepaying. From when the first postage stamps were used, postmarks were applied to prevent the stamps being used again. The first stamp, the "Penny black", became available for purchase 1 May 1840, to be valid as of 6 May 1840. Two days later, 8 May 1840, the Two penny blue was introduced. The Penny black was sufficient for a letter less than half an ounce to be sent anywhere within the UK. Both stamps included an engraving of the young Queen Victoria, without perforations, as the first stamps were separated from their sheets by cutting them with scissors. The first
Postage stamp document concerning methods of indicating that postage had been paid on mail he states: Chalmers' original document is now in the United Kingdom's National Postal Museum. Since Chalmers used the same postage denominations that Hill had proposed in February 1837, it is clear that he was aware of Hill’s proposals, but whether he obtained a copy of Hill’s booklet or simply read about it in one or both of the two detailed accounts (25 March 1837 and 20 December 1837) published in "The Times" is unknown. Neither article mentioned "a bit of paper just large enough to bear the stamp,"