Derry (or Londonderry) was a city in northern Ireland on Earth.
An alien entity, in the form of Rumpelstiltskin, told Miles O'Brien that a farmer from Derry had once tried to chase him away until he saved the farmer's crop from locusts. (DS9: "If Wishes Were Horses")
In an early script version, Rumpelstiltskin mentioned the English town of Chester instead of Londonderry.
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