[19] Page, Advanced Text-Book of Geology, p. 55.
[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.
[21] Lyell, Principles of Geology, vol. i., pp. 356-7.
[22] Principles of Geology, vol. i., p. 360.
[23] See Jukes, Manual of Geology, pp. 108-10; Hopkins, Presidential Address to the Geological Society of London, 1852, p. xxvii.
[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.
[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.
[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.
[27] Mantell’s Wonders of Geology, p. 70.
[28] In his notes to the translation of Humboldt’s Cosmos, p. xcvii.