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He was born in Ireland. After serving for some years in the British army, he retired with the rank of captain, and lived in England where he was the friend of David Garrick, Joshua Reynolds, Oliver Goldsmith, Samuel Johnson, Edmund Burke, Charles Burney and Charles Townshend. His appointment as master of the horse to the lord-lieutenant of Ireland took him back to Dublin.
He published, in the Mercury newspaper, a series of articles in defence of the lord-lieutenant's administration which were afterwards collected and issued in book form under the title of The Bachelor, or Speculations of Jeoffry Wagstaffe. A pension of £300, later doubled, was granted him, and he held his appointment under twelve succeeding viceroys.
From 1775 he took up writing plays. Among others, his tragedy Braganza was successfully performed at Drury Lane in 1775, Conspiracy in 1796, The Law of Lombardy in 1779, and The Count of Narbonne at Covent Garden in 1781, adapted from Horace Walpole's The Castle of Otranto. In 1794 he published an heroic poem Roman Portraits, and The Confessions of Jacques Baptiste Couteau, a satire on the excesses of the French Revolution. Jephson entered the Irish House of Commons in 1773 and sat for St Johnstown (County Longford) until 1776. Between 1777 and 1783, he served as Member of Parliament (MP) for Old Leighlin and subsequently represented Granard from 1783 to 1790. He died at Blackrock, near Dublin.
- This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "article name needed". Encyclopædia Britannica (11th ed.). Cambridge University Press.
- http://www.historyeye.ie/#!heraldry-essays/c1bl9 Robert Jephson of Blackrock Co. Dublin: "The Mortal Momus"
- Works by Robert Jephson at Project Gutenberg
- Works by or about Robert Jephson at Internet Archive
|Parliament of Ireland|
|Member of Parliament for
St Johnstown (County Longford)
With: Ralph Fetherston
Sir Ralph Fetherston, 1st Bt
Hon. John Vaughan
Sir John Blaquiere
|Member of Parliament for Old Leighlin
With: Sir John Blaquiere
Hon. Henry Luttrell
Hon. Arthur Acheson
William Long Kingsman
|Member of Parliament for Granard
With: George William Molyneux
John Ormsby Vandeleur
Thomas Pakenham Vandeleur