Postage stamp stamps did not need to show the issuing country, so no country name was included on them. The UK remains the only country to omit its name on postage stamps, using the reigning monarch’s head as country identification. Following the introduction of the postage stamp in the UK, prepaid postage considerably increased the number of letters mailed. Before 1839, the number of letters sent in the UK was typically 76 million. By 1850 this increased five-fold to 350 million, continuing to grow rapidly until the end of the 20th century when newer methods of indicating the payment of postage reduced
Postage stamps of Ireland organisations in 1984, An Post took over the responsibility for all Irish postal services including the issuing of postage stamps. To identify postage stamps used in Ireland between 1840 and 1922, it is necessary to identify the postmark cancelling the stamp as being from an Irish town. Stamps used during this period are referred to as "Great Britain used in Ireland". From 1840 to 1844, the Penny Black, and other stamps issued, were obliterated with the Maltese Cross cancellation. There was no text or numeral to help identify any of these cancels as Irish, but some Maltese Crosses are uniquely