[39] Lyell, Principles of Geology, vol. i., p. 431.
[40] Id. ib., p. 429.
[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.
[42] From a Special Correspondent, in the Times Newspaper, December 7, 1866.
[43] Horner, Alluvial Land of Egypt, Phil. Trans., part I., for 1855; Lyell, Principles of Geology, vol. i., pp. 431-9.
[44] The English Cyclopædia, Alluvium.
[45] Lyell, Principles of Geology, vol. i., chapters XVIII., XIX.
[46] Consolations in Travel, p. 127.
[47] Handbook of Rome and its Environs: Murray, 1858, p. 325.
[48] Lyell, Principles of Geology, vol. i., 400-3.