Colonel Sir Tatton Benvenuto Mark Sykes, 6th Baronet (16 March 1879 – 16 February 1919) was an English traveller, Conservative Party politician, and diplomatic advisor, particularly with regard to the Middle East at the time of the First World War.

He is associated with the Sykes–Picot Agreement, drawn up while the war was in progress regarding the partitioning of the Ottoman Empire by the United Kingdom, France and the Russian Empire, and was a key negotiator of the Balfour Declaration.

Mark Sykes

Early life

Born in Westminster, London, Mark Sykes was the only child of Sir Tatton Sykes, 5th Baronet, who, when a 48-year-old wealthy bachelor, married Christina Anne Jessica Cavendish-Bentinck, 30 years his junior. Several accounts suggest that his future mother-in-law essentially trapped Sir Tatton Sykes into marrying Christina. They were reportedly an unhappy couple. After spending large amounts of money paying off his wife's debts, Sir Tatton published a notice in the papers disavowing her future debts and legally separating from her.

Mark Sykes

Lady Sykes lived in London, and Mark divided his time between her home and his father's 34,000 acre (120 km2) East Riding of Yorkshire estates. Their seat was Sledmere House. Lady Sykes converted to Roman Catholicism and Mark was brought into that faith from the age of three.

Mark Sykes

Sledmere House "lay like a ducal demesne among the Wolds, approached by long straight roads and sheltered by belts of woodland, surrounded by large prosperous farms...ornamented with the heraldic triton of the Sykes family...the mighty four-square residence and the exquisite parish church." The family farm also had a stud, where Sir Tatton Sykes bred his prized Arabs.

Mark Sykes was left much to his own devices and developed an imagination, without the corresponding self-discipline to make him a good scholar. Most winters he travelled with his father to the Middle East, especially the Ottoman Empire.

Sykes was educated at the Jesuit Beaumont College and Jesus College, Cambridge. He did not finish a degree, unlike his rival T. E. Lawrence, who graduated from Jesus College, Oxford. By the age of twenty-five, Sykes had published at least four books; D'Ordel's Pantechnicon (1904), a parody of the magazines of the period (illustrated by Edmund Sandars); D'Ordel's Tactics and Military Training (1904), a parody of the Infantry Drill Book of 1896 (also with Sandars); and two travel books, Dar-ul-Islam ('The Home of Islam', 1904) and Through Five Turkish Provinces (1900). He also wrote The Caliphs' Last Heritage: A Short History of the Turkish Empire, the first half of which is a brief overview of political geography of the Middle East up to the Ottoman Empire while the second half is an account of the author's travels in Asia Minor and the Middle East between 1906 and 1913.

At his memorial service an old friend, Aubrey Herbert, diplomat and scholar, would remember Sir Mark Sykes with affection: "An effervescent personality; he could turn a gathering into a party, a party into a festival. He bubbled with ideas, and he swept up his listeners with his enthusiasm. In addition he had a remarkable talent for sketching caricatures and for mimicry ... Mark Sykes had vitality beyond any man I have ever met. When one had been in his company one felt almost as if one had been given from the fountain of life."

The Boer War, travels and Parliament

Heir to vast Yorkshire estates and a baronetcy, Sykes was not content to await his inheritance. In 1897 he was commissioned into the 3rd (Militia) Battalion of the Green Howards. Sykes was sent abroad with the 5th Battalion of the Green Howards during the Second Boer War for two years, where he was engaged mostly in guard duty, but saw action on several occasions. Following the war, he was promoted to captain on 28 February 1902, and returned to the United Kingdom on 15 May the same year, when the appointment was confirmed. He travelled extensively, especially in the Middle East.

From 1904 to 1905 he was Parliamentary Secretary to the Chief Secretary for Ireland, George Wyndham in the last year of Balfour's administration. He made a friend of the Prime Minister, who went on to serve as Foreign Secretary during the First World War, when Sykes worked closely with him. Transferred by Balfour, he served as honorary attaché to the British Embassy in Constantinople 1905–06, at which time he began a lifetime's interest in middle eastern affairs of state.