"Fragments of a Poetics of Fire (A Retrospective Glance at the Lifework of a Master of Books)". Book by Gaston Bachelard edited by Suzanne Bachelard, 1988.
Thomas Jefferson (1829). “Memoirs Corespondence and Private Papers of Thomas Jefferson Late, President of the United States: Now First Published the Original Manuscripts”, p.347
John Milton (1748). “The Poetical Works of Mr. John Milton: Containing Paradise Lost, ... Paradise Regain'd, ... Samson Agonistes, ... And His Poems on Several Occasions. With a Tractate of Education. In Two Volumes”, p.58