 He returned to "The Magician's Nephew" late in 1950, after completing "The Silver Chair".He managed to finish close to three-quarters of the novel, and then halted work once again after Roger Green, to whom Lewis showed all his writing at the time, suggested there was a structural problem in the story.Finally he returned to the novel in 1953, after finishing "The Last Battle" in the spring of that year and completed early in 1954.