Henry David Thoreau, Abigail Rorer (2010). “Of Woodland Pools, Spring-holes & Ditches: Excerpts from the Journal of Henry David Thoreau Wherein He Observes and Reflects Upon the Nature of Life and Vernal Pools”, p.60, Counterpoint Press
Henry David Thoreau (2014). “Citizen Thoreau: Walden, Civil Disobedience, Life Without Principle, Slavery in Massachusetts, A Plea for Captain John Brown”, p.190, Graphic Arts Books