Postage stamps and postal history of the United States a precondition for their issue by a nation was the establishment of standardized rates for delivery throughout the country. If postal fees were to remain (as they were in many lands) a patchwork of many different jurisdictional rates, the use of stamps would only produce limited gains in efficiency, for postal clerks would still have to spend time calculating the rates on many letters: only then would senders know how much postage to put on them. The introduction of postage stamps in the UK in May 1840 was received with great interest in the United States (and around the world).
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