[Footnote 20: See on this subject, Lyell’s Principles of Geology, vol. i., p. 458, and pp. 480-3; Jukes, Manual of Geology, pp. 105-11; Page, Advanced Text-Book of Geology, pp. 52-56.] [Footnote 21: Lyell, Principles of Geology, vol. i., pp. 356-7.] [Footnote 22: Principles of Geology, vol. i., p. 360.] [Footnote 23: See Jukes, Manual of Geology, pp. 108-10; Hopkins, Presidential Address to the Geological Society of London, 1852, p. xxvii.] [Footnote 24: For these facts see Lyell, Principles of Geology, vol. i., pp. 349, 350; Quarterly Journal of Science, No. xiii., New Series; The English Cyclopædia, Natural History Division, Alluvium.] [Footnote 25: For these facts illustrating the destructive action of the waves of the sea we are chiefly indebted to the following authorities: Hibbert, Description of the Shetland Isles; Phillips, Rivers, Mountains, and Sea-coast of Yorkshire; Geology of Yorkshire, by the same author; Pennant’s Arctic Zoology, vol. i.; Lyell’s Principles of Geology, vol. i., chapters xx. and xxi.; Gardner’s History of the Borough of Dunwich; the English Cyclopædia, Alluvium.] [Footnote 26: Rennell’s Investigation of the Currents in the Atlantic Ocean; Maury’s Physical Geography of the Sea, chapters ii. and iii.; Humboldt’s Cosmos; The English Cyclopædia, Atlantic Ocean; Lyell’s Principles of Geology, vol. i., chapter xx.] [Footnote 27: Mantell’s Wonders of Geology, p. 70.] [Footnote 28: In his notes to the translation of Humboldt’s Cosmos, p. xcvii.] [Footnote 29: A Hymn before Sunrise in the Vale of Chamouni, by Samuel Taylor Coleridge.] [Footnote 30: Lyell’s Principles of Geology, vol. i., pp. 374-5.] [Footnote 31: Voyage in 1822, p. 233.] [Footnote 32: Elements of Geology, pp. 145, 146.] [Footnote 33: Captain Horsburg, On Icebergs in Low Latitudes. Phil. Trans., 1830.] [Footnote 34: Agassiz, Etudes sur les Glaciers; Tyndall, Glaciers of the Alps; also Heat as a mode of Motion, by the same Author; Lyell, Principles of Geology, vol. i., chapter xvi.; Elements of Geology, chapters xi., xii.; Wallace, Ice Marks in North Wales, in the Quarterly Journal of Science, No. xiii.] [Footnote 35: Elements of Geology, p. 38.] [Footnote 36: Mantell, Wonders of Geology, vol. i., p. 102.] [Footnote 37: Lyell, Elements of Geology, p. 42; also Principles, vol. i., p. 410.] [Footnote 38: Mantell’s Wonders of Geology, pp. 70, 81, 82, 83.] [Footnote 39: Lyell, Principles of Geology, vol. i., p. 431.] [Footnote 40: Id. ib., p. 429.] [Footnote 41: The figures given by Sir Charles Lyell, and derived from the observations of Mr. Everest, are these: total discharge during the four months of rain, 6,082,041,600 cubic feet; total discharge during the three months of hot weather, 38,154,240 cubic feet.--Principles of Geology, vol. i., p. 481.] [Footnote 42: From a Special Correspondent, in the Times Newspaper, December 7, 1866.]