This collaborator with William Wordsworth on Lyrical Ballads included in it a poem in which the title figure is won by Life-in-Death after shooting an albatross.  
This author called the title object the "Most musical, most melancholy bird!" in The Nightingale, one of his Conversational Poems. In another poem, "twice five miles of fertile ground/With walls and towers were girdled round" because "In Xanadu" the title character "A stately pleasure-dome (decreed)." This collaborator with William Wordsworth on Lyrical Ballads included in it a poem in which the title figure is won by Life-in-Death after shooting an albatross.  For 10 points, name this author of Kubla Khan and The Rime of the Ancient Mariner.
This author called the title object the "Most musical, most melancholy bird!"
Samuel Taylor Coleridge