C.S. Lewis's "Launcelot," a narrative poem about 300 lines long, was written in the early 1930s. The poem is available in "Narrative Poems", Ed. Walter Hooper. New York: Harcourt Brace Jovanovich, 1972. It deals with the return of the knights from the Quest for the Holy Grail, and Launcelot's explanation to Guinever of why he has changed.  Caroline Geer's 1976 "The Posthumous Narrative Poems of C. S. Lewis." MA Thesis, North Texas State University,  finds "Launcelot" "an effective dramatic narrative. . . . The story is a dramatization of the quest as the real struggle in men's lives as they search for truth and strive to consecrate themselves to the holy journey". Launcelot meets a lady who shows him three coffins: one for Lamorake, one for Tristram and one for him. Then she shows him that she has a blade rigged up which would chop off their heads if they were lying in the coffins. She wants to "make/Their sweetness mine beyond recovery." And so the poem ends.