William Keith Chambers Guthrie was born in London on 1 August 1906, the son of Charles Jameson Guthrie and his wife, both of Scottish descent. He had a sister, Katherine, who was also a Classical scholar. He was educated at Dulwich College before matriculating at Trinity College in Cambridge in 1925, having been awarded the Eric Evan Spicer classical scholarship. He won several prizes as an undergraduate, passing Part I and Part II of the Classical Tripos with a First (a starred First in Part II, which led to him being awarded the top Studentship, the Craven, followed the year after by the Chancellor's Medal for Classics). The Craven Studentship required six months to be spent on research away from Cambridge and so Guthrie joined the epigraphical expedition to Central Anatolia led by W. M. Calder and W. H. Buckler in Spring 1929, although the expedition lasted little more than two weeks due to Mrs Calder's illness. The rest of the summer was spent visiting Greece. He later contracted Malta fever which was traced back to goat's milk given to him by shepherds he met while trekking to Delphi. (Later letters refer frequently to his health probably as a result of the concerns this had raised in his family). The epigraphical studies published in the 'Monumenta Asiae Minoris Antiqua' Vol 4 (1933) were mainly the result of expeditions in 1930 and 1932, intended to complete a survey of monumental inscriptions of a region of Turkey stretching from Afyon Karahisar (Akroenos) to Uluborlu (Apollonia) and Dinar (Apameia), plus the area around ancient Eumeneia. Guthrie began as Calder's assistant, with the team recording twenty inscriptions a day, but was soon taking his own squeezes (copies of inscriptions made with wet filter paper and a fine brush). His travels and those he met on these expeditions, including locals, made a strong impression on Guthrie and he frequently referred to his travels in Asia Minor in his books. During the 1930 expedition he was elected a Bye-Fellow of Peterhouse College and was invited to lecture for the Classical Tripos the following year, lecturing on Aristotle. He became an Assistant Lecturer in 1934, lecturing also on Greek Religious Thought (Part I) as well as Aristotle (Part II). He had become a full Fellow in 1932, becoming Professor in 1952. Guthrie spent a brief spell as University Proctor, 1936-7, dealing with various political and student issues (including a prospective visit to Cambridge by Oswald Mosely, which they deterred inadvertently by requiring it to be held only indoors). He was the University's Public Orator from 1939 to 1957. During the Second World War, Guthrie's wife and two children were evacuated from Cambridge to Wales, although he remained in Cambridge initially, before being commissioned into the Intelligence Corps. He was in London during the blitz before a period in St Albans (where his family joined him), then in 1943 was posted to the embassy in Istanbul making use of his knowledge of Turkey and Turkish. His main duties were in counter-intelligence, returning home in February 1945. In 1952, Guthrie was elected Laurence Professor of Ancient Philosophy and, in 1957, finally left Peterhouse to become the tenth Master of Downing College, where he remained until his retirement in 1972, presiding over a period which saw significant building work (the Kenny accommodation blocks and HKPA renovations to the Hall and new SCR). Professor Guthrie occasionally preached in the Chapel and oversaw a revision of the College Statutes which limited the tenure of the Mastership to fifteen years, which he voluntarily chose to observe himself, although it did not apply to him. He wrote 16 books on ancient philosophy over the course of his long and distinguished career. In 1956 he was approached by Cambridge University Press to write a multi-volume history of ancient philosophy, but on his death in 1981, the six volume series was unfinished. Professor Guthrie died on 17 May 1981.