Benjamin Franklin (1856). “The works of Benjamin Franklin: containing several political and historical tracts not included in any former edition, and many letters, official and private, not hitherto published ; with notes and a life of the author”, p.526
"The complete works of Ralph Waldo Emerson: Nature addresses and lectures", Vol. 1, by Ralph Waldo Emerson, Ann Arbor, Michigan: University of Michigan Library, 2006.