Johann Wolfgang von Goethe, Christopher Marlowe (2010). “Faust, Part I, Egmont and Hermann, Dorothea, Dr Faustus: The Five Foot Shelf of Classics, Vol. XIX (in 51 Volumes)”, p.209, Cosimo, Inc.
Matthew Fontaine Maury, United States Naval Observatory (1858). “Explanations and sailing directions to accompany the Wind and current charts: approved by Captain D. N. Ingraham, chief of the Bureau of ordnance and hydrography, and pub. by authority of Hon. Isaac Toucey, secretary of the Navy”, p.167
Sir Charles Lyell (1837). “Principles of Geology: Being an Inquiry how Far the Former Changes of the Earth's Surface are Referable to Causes Now in Operation”, p.244
P. J. O'Rourke (2007). “All the Trouble in the World: The Lighter Side of Overpopulation, Famine, Ecological Disaster, Ethnic Hatred, Plague, and Poverty”, p.338, Grove/Atlantic, Inc.