2 - secretaries to the British delegation: Tom Jones and Lionel Curtis.
3 - Treaty ports: Berehaven, Queenstown (Cobh) and Lough Swilly; deep water ports retained by the British Government as sovereign bases.
4 - secretaries to the Irish delegation: John Chartres, Erskine Childers, Fionán Lynch and Diarmuid O’Hegarty.
5 - Irish envoys plenipotentiary and signatories to the Treaty: Arthur Griffith (Minister for Foreign Affairs and chairman of the delegation); Michael Collins (Minister for Finance and deputy chairman of the delegation); Robert Barton (Minister for Economic Affairs); George Gavan Duffy and Éamonn Duggan.
6 - December 1921: the date the Treaty was signed.
7 - British negotiators and signatories to the Treaty: David Lloyd George (Prime Minister); Lord Birkenhead (Lord Chancellor); Austen Chamberlain (Lord Privy Seal); Winston Churchill (Secretary of State for the Colonies); Sir Hamar Greenwood (Chief Secretary for Ireland); Sir Gordon Hewart (Attorney General) and Sir Laming Worthington-Evans (Secretary for War).
10 - pounds per week sanctioned by the Cabinet members of the Irish delegation to Mrs Éamonn Duggan to be ‘expended at her discretion in providing entertainment and amusement for the Lady staff’ while working in London for the Irish delegation.
11 - October 1921: the date formal peace negotiations began at 10 Downing Street, London.
18 - clauses in the Anglo-Irish Treaty of 1921.
22 - Hans Place where the Irish delegation established their London headquarters.
24 - sub conference sessions held during the negotiations.
26 - counties in the new Irish Free State.
30 - the age of the youngest member of the Irish delegation, Michael Collins (Minister for Finance and deputy chairman of the delegation) who turned 31 on 16 October 1921, five days after the negotiations began.
49 - the age of the eldest member of the Irish delegation, Arthur Griffith (Minister for Foreign Affairs and chairman of the delegation).
18,348 - pounds spent on the peace negotiations, according to official Dáil Éireann accounts (£18,348 16s 7d).