Dartraighe (older spelling: Dartraige), anglicized as Dartree, Dartry or Dartrey, was a barony in medieval Ireland which stretched north to Clones and south to the Dromore river.
The house looked over the Dartrey estate, owned by Edward's father's cousin and benefactor, Thomas Dawson (1725–1813), 1st Viscount Cremorne, grandfather of Richard Dawson, 1st Earl of Dartrey.
According to the Introduction to the Dartrey Papers (published by P.R.O.N.I. in Belfast and available to view online), part of the Fairfield Estate, the Corry family's country estate that included Rockcorry, was bought for The 3rd Baron Cremorne (1817-1897), the young head of the Dawson family of neighbouring Dartrey, in 1831.