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18th century letters and papers
Part of The Rosse Papers
Eighteenth-century letters and papers, 1705-1887, of both branches of the Parsons family, but almost all of them deriving from the Parsonses of Parsonstown - excluding the papers of Sir Laurence Parsons, 5th Baronet, later 2nd Earle of Rosse, which constitute Sections C-F.
Correspondence relating to astronomy
Part of The Rosse Papers
Correspondence of the 3rd and 4th Earls of Rosse with fellow-astronomers or about the Birr and other observatories, including correspondence of the 5th and 6th Earls about the Birr Observatory, 1840-1909, 1913-14, 1938 and 1964-84.
Papers of Hon. Desmond Parsons
Part of The Rosse Papers
Letters and papers of the Hon. Desmond Parsons, younger brother of the 6th Earl of Rosse, 1920-38.
Part of The Rosse Papers
Maps, plans and drawings, [c.1610], 1638, [c. 1690] and c. 1750-1790, mainly of a size which makes it physically convenient to form them into a separate section.