Papers of P. J. Smyth, including letters of R. Pigott to Lady Florence Dixie, 1882 and to Caroline, Marchioness of Queensberry, 1875-6, many letters of the Marchioness (to Smyth?), n.d., letters of J. de L. Smyth to Lady Florence Dixie and others, c. 1885-1909, Papers relating to P. J. Smyth's property in Co. Cavan and to his financial affairs, 1864-84, and other letters.

Míreanna comhchosúla

• Death of P. J. Smyth, M. P.
  Foilsithe / Cruthaithe: (1885)
• Letters to Thomas James Smyth from N. S. Smyth in India, 1877.
• The late Mr. P. J. Smyth.
  de réir: Smyth, P. J.
  Foilsithe / Cruthaithe: (1885)
• Letters to Thomas James Smyth of Ballynegall, Co. Westmeath from Thomas Smyth of London, mainly re emigration to Australia, 1875-78.
• O'Neill Daunt correspondence. Letters to Daunt from persons with names beginning Q. to Z., including letters from the Marchioness of Queensberry 1884-92, and undated letters.