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 Bates, Henry Walter, 1825-1892
 Darwin, Charles, 1809-1882
 Kingsley, Charles, 1819-1875
 Lyell, Charles, Sir, 1797-1875


 Aristarchus of Samos (Oxford: Oxford University Press, 1913)
 From "the Rivers and Valleys of Pennsyvlvania," National Geographic Magazine, Vol. 1, Pp. 15– 71, 1889
 James Hutton’s Theory of the Phenomena Common to Stratified and Unstratified Bodies
 Journal of Reasearches Into the Geology and Natural History of the Various Countries Visited by H. M. S. Beagle, Pp. 554– 559
 Natural History, Bk. II
 The Immobility of the Earth in the Center of the World
 The Measurement of the Circumference of the Earth
 The Sizes and Distances of the Sun and Moon
 Uniformity