Orrery correspondence, containing copies of letters to and from the 4th and 5th Earls of Orrery, their family and friends, the volumes from which the published correspondence was selected. The volumes contain copies of poems, essays, and include letters to Pope, Swift, etc. and much unpublished material. Seven volumes, 1653-1757, but mostly 1720-57.

Míreanna comhchosúla

• Volume containing copies of the 5th Earl of Cork and Orrery's letters to The Busybody, written in his own hand, Oct., 1759.
• Eight volumes of business letters of the 4th and 5th Earls of Orrery, dealing mostly with their estates in Ireland and England, many of them originals, 1714-45. Vol. 3 contains copies of leases and an account of the Caledon estate.
• Two volumes containing letters and papers on public affairs addressed to the Earl of Orrery, 1657-75.
• The fourth Earl of Orrery's copy of his grandfather's famous play "Herod the Great", interleaved and containing a memoir on his writings by the 4th Earl.
• The first volume of a long essay on English history by the 5th Earl of Cork and Orrery, in his own hand, 1760.