F.B. Sanborn, "A Concord Notebook: Thoreau and Ellery Channing," The Critic & Literary World (New Rochelle: G.P. Putnam's Sons, 1905), 444-445.

Anna L. Curtis, "A Brief History of the Lyceum," Who's Who in the Lyceum, edited by A. August Wright (Philadelphia: Pearson Brothers, 1906), 23.

Franklin Benjamin Sanborn, The Life of Henry David Thoreau: Including Many Essays Hitherto Unpublished, and Some Account of His Family and Friends (Boston & New York: Houghton Mifflin, 1917), 46-48.