On The Letter E," while he requested that "silent let me sink to earth... I would not mar one hour of mirth" in a poem that ends by proclaiming "And know, whatever thou hast been, / 'Tis something better not to be;" that poem is called "Euthanasia."  
This author's lines "The beginning of eternity, the end of time and space, / The beginning of every end, and the end of every place" comprise his poem "A Riddle, On The Letter E," while he requested that "silent let me sink to earth... I would not mar one hour of mirth" in a poem that ends by proclaiming "And know, whatever thou hast been, / 'Tis something better not to be;" that poem is called "Euthanasia."  He wrote that "all that's best of dark and bright / Meet in her (*) aspect and her eyes" in a poem about a person with "A mind at peace with all below" and "A heart whose love is innocent."  In another poem in which "We were all inmates of one place," he described a "monarch of each race" who grew friends with his chains, causing him to regain his freedom with a sigh.  For 10 points, name this poet of "She Walks in Beauty" and "The Prisoner of Chillon," as well as "Don Juan."
This author's lines "The beginning of eternity, the end of time and space, / The beginning of every end, and the end of every place" comprise his poem "A Riddle,
Lord {Byron} (accept George {Gordon})