<human>: Burton was born in Torquay, Devon, at 21:30 on 19 March 1821; in his autobiography, he incorrectly claimed to have been born in the family home at Barham House in Elstree in Hertfordshire. He was baptized on 2 September 1821 at Elstree Church in Borehamwood, Hertfordshire. His father, Lt.-Colonel Joseph Netterville Burton, of the 36th Regiment, was an Irish-born British army officer of Anglo-Irish extraction who through his mother's family - the Campbells of Tuam - was a first cousin of Lt.-Colonel Henry Peard Driscoll and Mrs Richard Graves. Richard's mother, Martha Baker, was the daughter and co-heiress of a wealthy English squire, Richard Baker (1762-1824), of Barham House, Hertfordshire, for whom he was named. Burton had two siblings, Maria Katherine Elizabeth Burton (who married Lt.-General Sir Henry William Stisted) and Edward Joseph Netterville Burton, born in 1823 and 1824, respectively.  Burton's family travelled considerably during his childhood. In 1825, they moved to Tours, France. Burton's early education was provided by various tutors employed by his parents. He first began a formal education in 1829 at a preparatory school on Richmond Green in Richmond, Surrey, run by Rev. Charles Delafosse. Over the next few years, his family travelled between England, France, and Italy. Burton showed an early gift for languages and quickly learned French, Italian, Neapolitan, and Latin, as well as several dialects. During his youth, he was rumored to have carried on an affair with a young Roma (Gypsy) woman, learning the rudiments of her language, Romani. The peregrinations of his youth may have encouraged Burton to regard himself as an outsider for much of his life. As he put it, "Do what thy manhood bids thee do, from none but self expect applause".  Burton matriculated at Trinity College, Oxford, on 19 November 1840. Before getting a room at the college, he lived for a short time in the house of Dr. William Alexander Greenhill, then physician to the Radcliffe Infirmary. Here, he met John Henry Newman, whose churchwarden was Dr. Greenhill. Despite his intelligence and ability, Burton was antagonised by his teachers and peers. During his first term, he is said to have challenged another student to a duel after the latter mocked Burton's moustache. Burton continued to gratify his love of languages by studying Arabic; he also spent his time learning falconry and fencing. In April 1842, he attended a steeplechase in deliberate violation of college rules and subsequently dared to tell the college authorities that students should be allowed to attend such events. Hoping to be merely "rusticated" - that is, suspended with the possibility of reinstatement, the punishment received by some less provocative students who had also visited the steeplechase - he was instead permanently expelled from Trinity College.  Motivated by his love of adventure, Burton got the approval of the Royal Geographical Society for an exploration of the area, and he gained permission from the board of directors of the British East India Company to take leave from the army. His seven years in India gave Burton a familiarity with the customs and behaviour of Muslims and prepared him to attempt a Hajj (pilgrimage to Mecca and, in this case, Medina). It was this journey, undertaken in 1853, which first made Burton famous. He had planned it whilst traveling disguised among the Muslims of Sindh, and had laboriously prepared for the adventure by study and practice (including undergoing the Muslim tradition of circumcision to further lower the risk of being discovered).  Although Burton was certainly not the first non-Muslim European to make the Hajj (Ludovico di Varthema did this in 1503), his pilgrimage is the most famous and the best documented of the time. He adopted various disguises including that of a Pashtun to account for any oddities in speech, but he still had to demonstrate an understanding of intricate Islamic traditions, and a familiarity with the minutiae of Eastern manners and etiquette. Burton's trek to Mecca was dangerous, and his caravan was attacked by bandits (a common experience at the time). As he put it, though "... neither Koran or Sultan enjoin the death of Jew or Christian intruding within the columns that note the sanctuary limits, nothing could save a European detected by the populace, or one who after pilgrimage declared himself an unbeliever". The pilgrimage entitled him to the title of Hajji and to wear the green head wrap. Burton's own account of his journey is given in A Personal Narrative of a Pilgrimage to Al-Madinah and Meccah.  When Burton returned to the British Army, he sat for examination as an Arab linguist. The examiner was Robert Lambert Playfair, who disliked Burton. As Professor George Percy Badger knew Arabic well, Playfair asked Badger to oversee the exam. Having been told that Burton could be vindictive, and wishing to avoid any animosity should Burton fail, Badger declined. Playfair conducted the tests; despite Burton's success living as an Arab, Playfair had recommended to the committee that Burton be failed. Badger later told Burton that "After looking [Burton's test] over, I [had] sent them back to [Playfair] with a note eulogising your attainments and ... remarking on the absurdity of the Bombay Committee being made to judge your proficiency inasmuch as I did not believe that any of them possessed a tithe of the knowledge of Arabic you did."  Following his return to Cairo from Mecca, Burton sailed to India to rejoin his regiment. In March 1854, he transferred to the political department of the East India Company and went to Aden on the Arabian Peninsula in order to prepare for a new expedition, supported by the Royal Geographical Society, to explore the interior of the Somali Country and beyond, where Burton hoped to discover the large lakes he had heard about from Arab travelers. It was in Aden in September of this year that he first met Lieutenant John Hanning Speke, who would accompany him on his most famous exploration. Burton undertook the first part of the trip alone. He made an expedition to Harar (in present-day Ethiopia), which no European had entered (indeed there was a prophecy that the city would decline if a Christian was admitted inside).  This leg of the expedition lasted from 29 October 1854 to 9 February 1855, with much of the time spent in the port of Zeila, where Burton, "assuming the disguise of an Arab merchant", awaited word that the road to Harar was safe. Burton not only travelled to Harar but also was introduced to the Emir and stayed in the city for ten days, officially a guest of the Emir but in reality his prisoner. The journey back was plagued by lack of supplies, and Burton wrote that he would have died of thirst had he not seen desert birds and realized they would be near water.  Following this adventure, Burton prepared to set out for the interior accompanied by Lieutenant Speke, Lieutenant G. E. Herne and Lieutenant William Stroyan and a number of Africans employed as bearers. However, while the expedition was camped near Berbera, his party was attacked by a group of Somali waranle ("warriors"). The officers estimated the number of attackers at 200. In the ensuing fight, Stroyan was killed and Speke was captured and wounded in eleven places before he managed to escape. Burton was impaled with a javelin, the point entering one cheek and exiting the other. This wound left a notable scar that can be easily seen on portraits and photographs. He was forced to make his escape with the weapon still transfixing his head. It was no surprise then that he found the Somalis to be a "fierce and turbulent race". However, the failure of this expedition was viewed harshly by the authorities, and a two-year investigation was set up to determine to what extent Burton was culpable for this disaster. While he was largely cleared of any blame, this did not help his career. He describes the harrowing attack in First Footsteps in East Africa (1856).  In 1855, Burton rejoined the army and traveled to the Crimea, hoping to see active service in the Crimean War. He served on the staff of Beatson's Horse, a corps of Bashi-bazouks, local fighters under the command of General Beatson, in the Dardanelles. The corps was disbanded following a "mutiny" after they refused to obey orders, and Burton's name was mentioned (to his detriment) in the subsequent inquiry. CANNOTANSWER

Answer this question "Why did he disguise himself?" by extracting the answer from the text above.
<bot>: laboriously prepared for the adventure by study and practice (including undergoing the Muslim tradition of circumcision to further lower the risk of being discovered).