An essay on the art of conveying secret and swift intelligence. With 3 plates.

Míreanna comhchosúla

• Telegraph code, by R. L. Edgeworth, with the heading, Vocabulary complete. Late 18th cent.
• Papers of R. L. Edgeworth relating to the Telegraph system, drafts and copies of letters by Edgeworth, letters to Edgeworth from Littlehales in Dublin Castle, rules and orders, staff, estimates, etc., 1803-1811.
• Letter to Rev. Henry Ussher, giving an account of some experiments on wheel carriages. With 1 plate.
  de réir: Edgeworth, Richard Lovell
  Foilsithe / Cruthaithe: (1787)
• On the practicability and advantages of rail roads, and the means of carrying the same into effect. From Nicholson's Journal for March, 1802.
  de réir: Edgeworth, Richard L.
  Foilsithe / Cruthaithe: (1825)
• Letters of Maria Edgeworth, Richard Lovell Edgeworth and other members of the Edgeworth family, mainly to relatives (many to members of the Ruxton family), including some referring to Sir Walter Scott. c. 700 letters, with a rough list by Prof. R. L. Butler.