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Robert Hues (1553 – 24 May 1632) was an English mathematician and geographer. He attended St. Mary Hall at Oxford, and graduated in 1578. Hues became interested in geography and mathematics, and studied navigation at a school set up by Walter Raleigh. During a trip to Newfoundland, he made observations which caused him to doubt the accepted published values for variations of the compass. Between 1586 and 1588, Hues travelled with Thomas Cavendish on a circumnavigation of the globe, performing astronomical observations and taking the latitudes of places they visited. Beginning in August 1591, Hues and Cavendish again set out on another circumnavigation of the globe. During the voyage, Hues made astronomical observations in the South Atlantic, and continued his observations of the variation of the compass at various latitudes and at the Equator. Cavendish died on the journey in 1592, and Hues returned to England the following year. In 1594, Hues published his discoveries in the Latin work ''Tractatus de globis et eorum usu'' (''Treatise on Globes and Their Use'') which was written to explain the use of the terrestrial and celestial globes that had been made and published by Emery Molyneux in late 1592 or early 1593, and to encourage English sailors to use practical astronomical navigation. Hues' work subsequently went into at least 12 other printings in Dutch, English, French and Latin. Hues continued to have dealings with Raleigh in the 1590s, and later became a servant of Thomas Grey, 15th Baron Grey de Wilton. While Grey was imprisoned in the Tower of London for participating in the Bye Plot, Hues stayed with him. Following Grey's death in 1614, Hues attended upon Henry Percy, the 9th Earl of Northumberland, when he was confined in the Tower; one source states that Hues, Thomas Harriot and Walter Warner were Northumberland's constant companions and known as his "Three Magi", although this is disputed. Hues tutored Northumberland's son Algernon Percy (who was to become the 10th Earl of Northumberland) at Oxford, and subsequently (in 1622–1623) Algernon's younger brother Henry. In later years, Hues lived in Oxford where he was a fellow of the University, and discussed mathematics and related subjects with like-minded friends. He died on 24 May 1632 in the city and was buried in Christ Church Cathedral. ==Early years and education== Robert Hues was born in 1553 at Little Hereford in Herefordshire, England. In 1571, at the age of 18 years, he entered Brasenose College, University of Oxford.〔.〕〔.〕 English antiquarian Anthony à Wood (1632–1695) wrote that when Hues arrived at Oxford he was "only a poor scholar or servitor ... he continued for some time a very sober and serious servant ... but being sensible of the loss of time which he sustained there by constant attendance, he transferred himself to St Mary's Hall".〔. At Oxford, a servitor was an undergraduate student who worked as a servant for fellows of the University in exchange for free accommodation and some meals, and exemption from paying fees for lectures.〕 Hues graduated with a Bachelor of Arts (B.A.) degree on 12 July 1578,〔, vols. 1–2. Hues is listed under the name "Hughes".〕 having shown marked skill in Greek. He later gave advice to the dramatist and poet George Chapman for his 1616 English translation of Homer,〔.〕 and Chapman referred to him as his "learned and valuable friend".〔: see Markham, "Introduction", ''Tratatus de globis'', p. xxxv. According to another source, Chapman called Hues "another right learned, honest, and entirely loved friend of mine": see . See also .〕 According to the ''Oxford Dictionary of National Biography'', there is unsubstantiated evidence that after completing his degree Hues was held in the Tower of London, though no reason is given for this, then went abroad after his release.〔 It is possible he travelled to Continental Europe.〔Markham, "Introduction", ''Tractatus de globis'', p. xxxv.〕 Hues was a friend of the geographer Richard Hakluyt, who was then regent master of Christ Church. In the 1580s, Hakluyt introduced him to Walter Raleigh and explorers and navigators whom Raleigh knew. In addition, it is likely that Hues came to know astronomer and mathematician Thomas Harriot and Walter Warner at Thomas Allen's lectures in mathematics. The four men were later associated with Henry Percy, the 9th Earl of Northumberland,〔〔According to Kargon, "()t was probably through Percy (although the reverse is possible)" that Harriot came to know Hues: .〕 who was known as the "Wizard Earl" for his interest in scientific and alchemical experiments and his library.〔. See also 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Robert Hues」の詳細全文を読む スポンサード リンク
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