Robert Childers Barton (4 March 1881 – 10 August 1975) was an Irish nationalist, politician and farmer who participated in the negotiations leading up to the signature of the Anglo-Irish Treaty.
 His father was Charles William Barton and his mother was Agnes Childers.
 His wife was Rachel Warren of Boston, daughter of Fiske Warren.
 His double first cousin and close friend was Robert Erskine Childers.
The Constitution of the Irish Free State (Irish: "Bunreacht Shaorstáit Eireann" ) was the second constitution of the independent Irish state.
 It was adopted by Act of Dáil Éireann sitting as a constituent assembly on 25 October 1922.
 In accordance with Article 83 of the Constitution, the Irish Free State Constitution Act 1922 of the British Parliament, which came into effect upon receiving the royal assent on 5 December 1922, provided that the Constitution would come into effect upon the issue of a Royal Proclamation, which was done on 6 December 1922.
 In 1937 the Constitution of the Irish Free State was replaced by the modern Constitution of Ireland following a referendum.
Robert Caesar Childers (1838 – 25 July 1876) was a British Orientalist scholar, compiler of the first Pāli-English dictionary.
 Childers was the husband of Anna Barton of Ireland.
 He was the father of Irish nationalist Robert Erskine Childers and grandfather to the fourth President of Ireland, Erskine Hamilton Childers.
The Irish Bulletin was the official gazette of the government of the Irish Republic.
 It was produced by the Department of Propaganda during the Irish War of Independence.
 and its offices were originally located at No. 6 Harcourt Street, Dublin.
 The paper's first editor was Desmond FitzGerald, until his arrest and replacement by Robert Erskine Childers.
 "The Bulletin" appeared in weekly editions from 11 November 1919 to 11 July 1921.
Robert Erskine Childers DSC (25 June 1870 – 24 November 1922), universally known as Erskine Childers, was a British writer, whose works included the influential novel "The Riddle of the Sands", and a Fenian revolutionary who smuggled guns to Ireland in his sailing yacht "Asgard".
 He was executed by the authorities of the nascent Irish Free State during the Irish Civil War.
 He was the son of British Orientalist scholar Robert Caesar Childers; the cousin of Hugh Childers and Robert Barton; and the father of the fourth President of Ireland, Erskine Hamilton Childers.
Erskine Barton Childers (11 March 1929 – 25 August 1996) was an Irish writer, BBC correspondent and United Nations senior civil servant.
 He was the eldest son of Erskine Hamilton Childers (Ireland's fourth President) and Ruth Ellen Dow Childers.
 His grandparents Mary Alden Childers and Robert Erskine Childers and the latter's double first cousin Robert Barton were all Irish nationalists involved heavily with the negotiation of Irish independence; which ultimately led to his grandfather's execution during the Irish Civil War.
 His great aunt was Gretchen Osgood Warren.
Mameve Medwed is an American novelist.
 Born and raised in Bangor, Maine, she received her B.A. with honors from Simmons College and now lives in Cambridge, Massachusetts.
 She is the author of "Mail", "Host Family", "The End of an Error", "How Elizabeth Barrett Browning Saved My Life" (for which she received a 2007 Massachusetts Book Awards Fiction Honor), and "Of Men and Their Mothers".
Gretchen Osgood Warren (19 March 1868 – September 1961), the wife of Fiske Warren, was an actress, singer and poet.
 The daughter of Dr. Hamilton Osgood and Margaret Cushing Osgood of Beacon Hill, Boston, Massachusetts, her younger sister was Mary Alden Childers, the wife of writer and Irish nationalist Robert Erskine Childers.
 Her nephew Erskine Hamilton Childers served as the fourth President of Ireland from 1973-74.
The Irish Boundary Commission (Irish: "Coimisiún na Teorainne" ) met in 1924–25 to decide on the precise delineation of the border between the Irish Free State and Northern Ireland.
 The 1921 Anglo-Irish Treaty, which ended the War of Independence, provided for such a commission if Northern Ireland chose to secede from the Irish Free State, an event that occurred as expected two days after the Free State's inception on 6 December 1922.
 The governments of the United Kingdom, of the Irish Free State and of Northern Ireland were to nominate one member each to the commission.
 When the Northern government refused to cooperate, the British government assigned a Belfast newspaper editor to represent Northern Irish interests.
Mary Alden Osgood Childers, MBE (14 December 1875 – 1 January 1964) was an American-born Irish writer and Irish nationalist.
 She was the daughter of Dr Hamilton Osgood and Margaret Cushing Osgood of Beacon Hill, Boston, Massachusetts.
 Her older sister was Gretchen Osgood Warren.
 Molly married the writer and Irish nationalist, Robert Erskine Childers.
 Their son, Erskine Hamilton Childers, became the fourth President of Ireland.

Question: Which author was executed by the Irish Free State, Robert Erskine Childers or Mameve Medwed?
Answer: Robert Erskine Childers