Question: What were these letters from World War I authored by British High Commissioner to Egypt on the political status of lands under the Ottoman Empire that came to attention during the Cairo Conference?

Context paragraphs:
McMahon–Hussein Correspondence: The McMahon–Hussein Correspondence, or the Hussein–McMahon Correspondence, was a series of ten letters exchanged from July 1915 to March 1916, during World War I, between Hussein bin Ali, Sharif of Mecca, and Lieutenant Colonel Sir Henry McMahon, British High Commissioner to Egypt, concerning the political status of lands under the Ottoman Empire.  In the letters Britain agreed to recognize Arab independence after World War I "in the limits and boundaries proposed by the Sherif of Mecca", with the exception of "portions of Syria" lying to the west of "the districts of Damascus, Homs, Hama and Aleppo", in exchange for launching the Arab Revolt against the Ottomans as a "quid pro quo".

Canadian High Commissioners to Newfoundland: The Canadian High Commission to Newfoundland was opened in 1941 for purposes of co-ordinating the war effort and in particular defence during World War II.  When Canada negotiated with the United Kingdom government about the appointment of Canadian High Commissioner to Newfoundland, it also asked that a reciprocal representative of Newfoundland be stationed in Ottawa.  The British government refused to consider an appointment of a representative with the rank of High Commissioner as Newfoundland was no longer fully self-governing and instead suggested that the Canadian government accept an Agent-General for Newfoundland who would be appointed to both Ottawa and Washington, D.C. and that the Agent's role be confined to "supply, commercial, and technical questions" and that political matters be directed instead to the British High Commission in Ottawa.  The Canadian government rejected the dual appointment and suggested the appointment of an Accredited Representative.  The negotiations were never resolved.

Partition of the Ottoman Empire: The partition of the Ottoman Empire (Armistice of Mudros, 30 October 1918 – Abolition of the Ottoman Sultanate, 1 November 1922) was a political event that occurred after World War I and the occupation of Constantinople by British, French and Italian troops in November 1918.  The partitioning was planned in several agreements made by the Allies early in the course of World War I, notably the Sykes-Picot Agreement.  As world war loomed, the Ottoman Empire sought protection but was rejected by Britain, France, and Russia, and finally formed the Ottoman–German Alliance.  The huge conglomeration of territories and peoples that formerly comprised the Ottoman Empire was divided into several new states.  The Ottoman Empire had been the leading Islamic state in geopolitical, cultural and ideological terms.  The partitioning of the Ottoman Empire led to the rise in the Middle East of Western powers such as Britain and France and brought the creation of the modern Arab world and the Republic of Turkey.  Resistance to the influence of these powers came from the Turkish national movement but did not become widespread in the post-Ottoman states until after World War II.

Greco-Turkish War (1897): The Greco-Turkish War of 1897, also called the Thirty Days' War and known in Greece as the Black '97 (Greek: Μαύρο '97 , "Mauro '97") or the Unfortunate War (Ατυχής πόλεμος, "Atychis polemos"), was a war fought between the Kingdom of Greece and the Ottoman Empire.  Its immediate cause was the question over the status of the Ottoman province of Crete, whose Greek majority long desired union with Greece.  Despite the Ottoman victory at the field, an autonomous Cretan State under Ottoman suzerainty was established the following year (as a result of the intervention of the Great Powers after the war), with Prince George of Greece and Denmark as its first High Commissioner.

List of Australian High Commissioners to Kenya: The High Commissioner of Australia to Kenya and Permanent Representative of Australia to the United Nations Office in Nairobi is an officer of the Australian Department of Foreign Affairs and Trade and the head of the Embassy of the Commonwealth of Australia to the Republic of Kenya in Nairobi.  The position has the rank and status of an Ambassador Extraordinary and Plenipotentiary and also holds non-resident accreditation to Burundi (since 1987), Rwanda (since 1987), Somalia, Tanzania (since 1987) and Uganda (since 1965).  The High Commissioner also acts as Permanent Representative of Australia to the United Nations Office at Nairobi, including the United Nations Environment Programme and the United Nations Human Settlements Programme.  The High commissioner is also representative to the East African Community and the International Conference on the Great Lakes Region.  The High Commissioner is currently Alison Chartres since 10 August 2017.

Victoria Treadell: Victoria "Vicki" Marguerite Treadell CMG MVO (born 4 November 1959) is the current British High Commissioner to Malaysia and has been in the posting since October 2014.  She is the former British High Commissioner to New Zealand and Samoa, and Governor of the Pitcairn Islands.

Ottoman–Mamluk War (1516–17): The Ottoman–Mamluk War of 1516–1517 was the second major conflict between the Egypt-based Mamluk Sultanate and the Ottoman Empire, which led to the fall of the Mamluk Sultanate and the incorporation of the Levant, Egypt and the Hejaz as provinces of the Ottoman Empire.  The war transformed the Ottoman Empire from a realm at the margins of the Islamic world, mainly located in Anatolia and the Balkans, to a huge empire encompassing the traditional lands of Islam, including the cities of Mecca, Cairo, Damascus and Aleppo.  It continued to be ruled however from Constantinople.

Cairo Conference (1921): The 1921 Cairo Conference, described in the official minutes as Middle East Conference held in Cairo and Jerusalem, March 12 to 30, 1921, was a series of meetings by British officials for examining and discussing Middle Eastern problems, and to frame a common policy.  Particular concerns of the conference related to resolving the conflicting policies defined in the McMahon letters (1915), the Sykes-Picot agreement (1916) and the Balfour Declaration (1917).  Winston Churchill, the newly appointed Colonial Secretary, called all the British Military Leaders and civil administrators in the Middle East to a conference at the Semiramis hotel in Cairo to discuss these issues.  It was an experimental conference organized by the Colonial Office, with the purpose to solve problems more efficiently, with improved communications, without protracted correspondence.

Cairo Anti-war Conference: The Cairo Conference against U.S. hegemony and war on Iraq and in solidarity with Palestine (later: Popular Campaign for the Support of Resistance in Palestine and Iraq and Against Globalization), generally known simply as Cairo Anti-war Conference, is an anti-war and anti-neo-liberalism conference held regularly since 2002 in Cairo, Egypt.  The Cairo Conference set up the International Campaign Against Aggression on Iraq which helped to coordinate the worldwide demonstrations on 15 February 2003.  In 2009, the Conference was banned by the government of former Egyptian President Hosni Mubarak.

Hain Ahmed Pasha: Hain Ahmed Pasha ("Ahmed Pasha the Traitor"; died 1524) was an Ottoman governor, beylerbey, and statesman.  He was appointed as the Governor of Egypt in 1523.  Disappointed that he had not been made Grand Vizier and his rival Pargalı Ibrahim Pasha had been appointed in his place, he declared himself the Sultan of Egypt, independent from the Ottoman Empire.  He struck coins with his own face and name in order to legitimize his power and captured Cairo Citadel and the local Ottoman garrisons in January 1524.  However, after surviving an assassination attempt in his bath by two emirs that he had previously sacked, he fled Cairo and was finally captured and executed by Ottoman authorities by decapitation.  His rebellion created a short period of instability in the nascent Egypt Eyalet.  After his death, his rival Pargalı Ibrahim Pasha came down to Egypt and reformed the provincial military and civil administration.

Supporting paragraphs: Cairo Conference (1921) McMahon–Hussein Correspondence
Answer: the McMahon letters