Christine Kelsey was born at Mullion, Cornwall, the daughter of Donald Carlile Kelsey, a radio engineer, and May Rowe. She was educated at Chelmsford County High School for Girls and came to Girton College to read Natural Sciences in 1949. She gained a rowing blue in 1951. A research studentship from 1952-1956 enabled her to work on the crystal structure of tobermorite and she gained her PhD in 1958. She was a Bye-Fellow of Girton from 1956-57 and undertook research in Canada 1957-58. She returned to Girton in 1958, initially as a Hertha Ayrton Research Fellow, becoming an Official Fellow in 1963. Christine Kelsey married Duncan McKie, a Fellow of Jesus College, Cambridge, in 1966. At Girton she held the following offices: Tutor, 1963-69; Director of Studies in Physical Sciences from 1968; Praelector, 1968-73; Vice-Mistress, 1987-96; and Registrar of the Roll, 1989-93. In addition, she was a University Demonstrator in the Department of Mineralogy and Petrology, 1958-63, a University Lecturer, 1963-80 (in Mineralogy and Petrology until 1980 then in the Department of Earth Sciences until retirement); and Additional Pro-Proctor in the University, 1969-70, and a Deputy Proctor 1970-71 and 1973-74. On her retirement in 1998, Christine McKie became a Life Fellow of Girton College. She published mainly in the field of mineralogical crystallography, including articles co-authored with Helen Megaw (Girton 1926: see GCPP Megaw). She co-authored 'Crystalline Solids' with Duncan McKie in 1974 and wrote 'Essentials of Crystallography' in 1986. Christine McKie died on 23 August 2017.