[363] Rudiments of Geology, W. & R. Chambers, p. 10.
[364] Lyell's Principles of Geology, p. 3.
[365] Miller, Old Red Sandstone, p. 25.
[366] Hugh Miller, Footprints of the Creator, p. 313.
[367] American Cyclopædia, 1863, p. 374. Annual of Scientific Discovery, 1861, p. 351.
[368] London Quarterly Review, 1866, No. 51, p. 240.
[369] Lyell's Second Visit to the United States.
[370] The Advance, Chicago, May 28, 1868.
[371] Geological Time.
[372] Principles, Chaps. III. and IV.