22 Hans Place formed the headquarters of the 1921 Irish Treaty delegation. The delegates were Arthur Griffith, Robert Barton, and Michael Collins; Secretary to the delegation was Robert Erskine Childers, who was also Robert Barton's cousin and father of the fourth President of Ireland Erskine Hamilton Childers. At 11.15 PM on 5 December 1921, the delegates made the historic decision to recommend the treaty to the Dáil Éireann; the negotiations finally closed with the signing of the Anglo-Irish Treaty at 2.20am on 6 December 1921.