Possible Clues:

• Currier cohort
• ''Blue Tail Fly'' singer Burl
• Folksy Burl
• Currier's partner in printmaking
• Currier and __: printmakers
• Burly Burl
• Lithographer of Americana
• "As I was going to St. ___, I met a man with seven wives"
• St. __: Cornwall town
• Composer of Emerson, Hawthorne, the Alcotts and Thoreau