David Lehman is looking for a line beginning with "D" — in iambic tetrameter or pentameter preferably — for the American Scholar's crowd-sourced acrostic poem spelling out Ralph Waldo Emerson's middle name and relating to his celebration of "Whim" in his essay "Self-Reliance."
You can read the acrostic to date and enter your line at the American Scholar's site.
— sdh