The first five stanzas of a poem by this author all end with the phrase (*) "without a spot" to describe an object that fell down a mound covered in herbs. After falling asleep in a "garden green," the narrator of a poem by this author dreams of a different garden in which the title character lies out of reach across a river representing death. In a different poem by this author, a man turns down a woman’s offer of a ring, but accepts her silken girdle instead. This author used a shifting meter called “bob and wheel” for the stanzas of a poem in which an enchanted sash protects one title character from being beheaded by Lord Bertilak’s axe. For 10 points, name this poet, named either for his allegorical work about a father grieving his lost daughter, or for his poem about the title character’s promise with the Green Knight. ■END■