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In the end, Lewis enjoyed a long and productive period at Cambridge, until ill health finally forced him to resign his chair with effect from October 1963. By my reckoning, Lewis wrote thirteen books and forty-four articles during his Cambridge years, not to mention numerous book reviews and several poems, and he edited three collections of essays. There were controversies, of course, perhaps most significantly the 1960 debate with F. R. Leavis and his supporters over the merits of literary criticism. Nevertheless, Lewis’s Cambridge period—while not being anything like Bunyan’s “Plain called Ease”—was certainly an oasis of creativity, resulting in some of his most significant works, including Till We Have Faces (1956), Reflections on the Psalms (1958), The Four Loves (1960), An Experiment in Criticism (1961), and The Discarded Image (published posthumously in 1964). Yet Lewis’s Cambridge period was dominated by an event in his personal life, which had a significant impact on his writings during this time. Lewis found a new—but rather demanding—literary stimulus: Helen Joy Davidman.
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Alister E. McGrath (C. S. Lewis: A Life: Eccentric Genius, Reluctant Prophet)