This poet described how "poetry exceeding music must take the place of empty heaven and its hymns." A poem by this author imagines "disaffected flagellants" causing "a jovial hullabaloo among the spheres." A poem by this author describes his atheist mentor George Santayana "on the threshold of heaven" in Rome. Men chant their "boisterous devotion to the sun" in a poem by this author that describes pigeons sinking "downward to darkness." This author's poem "A High-Toned Old Christian Woman" (-5[1])declares that "poetry is the supreme fiction." This author wrote a poem that proclaims, "Death is the mother of beauty." A poem about a woman (10[1])enjoying "coffee and oranges in a sunny chair" and the "complacencies of the peignoir" (pay-NWAR) appears in this poet's collection Harmonium. For 10 points, name this author of "Sunday Morning." ■END■