Sir Harold George Nicolson KCVO CMG (21 November 1886 – 1 May 1968) was an English diplomat, author, diarist and politician. He was the husband of writer Vita Sackville-West, their unusual relationship being described in their son's book, Portrait of a Marriage.
Early life 
Diplomatic career 
In 1909 Nicolson joined HM Diplomatic Service. He served as attaché at Madrid from February to September 1911, and then Third Secretary at Constantinople from January 1912 to October 1914. During the First World War, he served at the Foreign Office in London, during which time he was promoted Second Secretary. As the Foreign Office's most junior employee, it fell to him in August 1914 to hand Britain's revised declaration of war to the German ambassador in London. He served in a junior capacity in the Paris Peace Conference in 1919, for which he was appointed Companion of the Order of St Michael and St George (CMG) in the 1920 New Year Honours.
In 1925, he was promoted Counsellor and posted to Tehran as Chargé d'affaires. However, in Summer 1927 he was recalled to London and demoted to First Secretary for criticising his Minister, Sir Percy Loraine, in a dispatch. He was posted to Berlin as Chargé d'affaires in 1928. He was promoted Counsellor again, but resigned from the Diplomatic Service in September 1929.
Political career 
From 1930 to 1931, Nicolson wrote for the Evening Standard, but found it increasingly tedious.
In 1931, he joined Sir Oswald Mosley and his recently formed New Party. He stood unsuccessfully for Parliament for the Combined English Universities in the general election that year and edited the party newspaper, Action. He ceased to support Mosley when the latter formed the British Union of Fascists the following year.
Nicolson entered the House of Commons as National Labour Member of Parliament (MP) for Leicester West in the 1935 election. In the latter half of the 1930s he was among a relatively small number of MPs who alerted the country to the threat of fascism. More a follower of Anthony Eden in this regard than of Winston Churchill, he nevertheless was a friend (though not an intimate) of Churchill, and often supported his efforts in the Commons to stiffen British resolve and support rearmament.
He became Parliamentary Secretary and official Censor  at the Ministry of Information in Churchill's 1940 wartime government of national unity, serving under Cabinet member Duff Cooper for approximately a year until he was asked by Churchill to leave his position; thereafter he was a well-respected backbencher, especially on foreign policy issues given his early and prominent diplomatic career. From 1941 to 1946 he was also on the Board of Governors of the BBC. He lost his seat in the 1945 election. Having joined the Labour Party, he stood in the Croydon North by-election in 1948, but lost once again.
Personal life 
In 1913, Nicolson married the writer Vita Sackville-West, who encouraged his literary ambitions. He published a biography of French poet Paul Verlaine in 1921, to be followed by studies of other literary figures such as Tennyson, Byron, Swinburne and Sainte-Beuve. In 1933, he wrote an account of the Paris Peace Conference entitled Peacemaking 1919.
Nicolson and his wife practised what today would be called an open marriage. Once, Harold had to follow Vita to France, where she had "eloped" with Violet Trefusis, to try to win her back. Harold himself was no stranger to homosexual affairs. Among others, he was involved in a long-lasting relationship with Raymond Mortimer, whom both he and Vita affectionately referred to as "Tray". They discussed their mutual homosexual tendencies frankly with each other, and remained happy together. They were, in fact, famously devoted to each other, writing almost every day when separated due to Harold's long diplomatic postings abroad, or Vita's insatiable wanderlust. Eventually, he gave up diplomacy, partly so they could live together in England. They had two sons, Nigel, also a politician and writer, and Benedict, an art historian.
In the 1930s, he and his wife acquired and moved to Sissinghurst Castle, near Cranbrook in Kent, the county known as the garden of England. There they created the renowned gardens that are now run by the National Trust.
Later life and legacy 
After Nicolson's last attempt to enter Parliament, he continued with an extensive social schedule and his programme of writing, which included books, book reviews, and a weekly column for The Spectator. He was appointed Knight Commander of the Royal Victorian Order (KCVO) in 1953, as a reward for writing the official biography of George V, which had been published in the previous year.
His younger son, the publisher and writer Nigel Nicolson, published works by and about his parents, including Portrait of a Marriage (frankly covering his parents' bisexuality), their correspondence, and Nicolson's diary. The latter is one of the pre-eminent British diaries of the 20th century and an invaluable source on British political history from 1930 through the 1950s, particularly in regard to the run-up to World War II and the war itself: Nicolson served in high enough echelons to write of the workings of the circles of power and the day-to-day unfolding of great events from, as it were, a medium distance. (His fellow parliamentarian Robert Bernays aptly characterized Nicolson as being "...a national figure of the second degree.") It is perhaps his diary, of all of his voluminous oeuvre, for which Harold Nicolson will be most remembered, as the author was variously an acquaintance, associate, friend, or intimate to such figures as Ramsay MacDonald, David Lloyd George, Duff Cooper, Charles de Gaulle, Anthony Eden and Winston Churchill, along with a host of literary and artistic figures.
Nicolson is also remembered for his 1932 novel Public Faces, the first book foreshadowing the nuclear bomb. A fictional account of British national policy in 1939, it tells how Britain's secretary of state tried to keep world peace, even with the Royal Air Force aggressively brandishing rocket airplanes and an atomic bomb. In today's terms, it was a multi-megaton bomb, and the geology of the Persian Gulf played a central role, but on the other hand, Nicolson never foresaw Hitler.
- Paul Verlaine (1921)
- Sweet Waters (1921) novel
- Tennyson: Aspects of His Life, Character and Poetry (1923)
- Byron: The Last Journey (1924)
- Swinburne (1926)
- Some People (1926)
- Portrait of a Diplomatist (1930)
- People and Things: Wireless Talks (1931)
- Public Faces (1932) novel
- Peacemaking 1919 (1933)
- Curzon: The Last Phase, 1919–1925: A Study in Post-War Diplomacy (1934)
- Dwight Morrow (1935)
- Diplomacy: a Basic Guide to the Conduct of Contemporary Foreign Affairs (1939)
- Why Britain is at War (1939)
- Friday Mornings 1941–1944 (1944)
- Another World Than This (1945) anthology, editor with Vita Sackville-West
- The Congress of Vienna: A Study in Allied Unity: 1812–1822 (1946)
- Comments 1944–1948 (1948) – collected articles from the Spectator
- King George V (1952)
- The Evolution of Diplomacy (1954) Chichele Lectures 1953
- The English Sense of Humour and other Essays (1946)
- Good Behaviour, being a Study of Certain Types of Civility (London: Constable and Company, 1955)
- Journey to Java (London: Constable, 1957)
- The Age of Reason (1700–1789) (1960)
- The London Gazette: . 30 December 1919.
- Ahmed Ali. Twilight in Delhi. Bombay: Oxford University Press, 1966, p. 2. This is from the introduction to the book, in which its author tells of H.N.'s role in getting it published in 1940. There is no reference to H.N.'s work in this capacity in his published Diaries, presumably due to the Official Secrets Act.
- Human Smoke: The Beginnings of World War II, the End of Civilization, Nicholson Baker, 2008
- Nicolson, Harold (1952). King George the Fifth, His Life and Reign. London: Constable. ISBN 978-0-09-453181-9. OCLC 1633172. Also under OCLC 255946522. Published in America as Nicolson, Harold (1953). King George the Fifth, His Life and Reign. Garden City, N.Y.: Doubleday. OCLC 1007202. Also under OCLC 476173.
- London: Constable & Co., 1948.
Further reading 
- Nigel Nicolson, Portrait of a Marriage, (Weidenfeld & Nicolson, 1973), ISBN 0-297-76645-7.
- Nigel Nicolson (ed.), The Harold Nicolson Diaries 1907–1963, (Weidenfeld & Nicolson, 2004), ISBN 0-297-84764-3
- James Lees-Milne, Harold Nicolson, A Biography, (Chatto & Windus), 1980, Vol. I (1886–1929), ISBN 0-7011-2520-9; 1981, Vol. II (1930–1968), ISBN 0-7011-2602-7.
- Nigel Nicolson (ed.), Vita and Harold. The Letters of Vita Sackville-West and Harold Nicolson 1910–1962 (Weidenfeld & Nicolson, 1992), ISBN 0-297-81182-7.
- David Cannadine: Portrait of More Than a Marriage: Harold Nicolson and Vita Sackville-West Revisited. From Aspects of Aristocracy, pp. 210–42. (Yale University Press, 1994), ISBN 0-300-05981-7.
- Norman Rose, Harold Nicolson (Jonathan Cape, 2005), ISBN 0-224-06218-2.
- Derek Drinkwater, Sir Harold Nicolson & International Relations, ( Oxford University Press, 2005), ISBN 0-19-927385-5.
|Parliament of the United Kingdom|
Ernest Harold Pickering
|Member of Parliament for Leicester West