Samuel Johnson (1833). “The Life of Johnson: with Maxims and Observations: Moral, Critical, and Miscellaneous, Accurately Selected from the Works of Dr. Samuel Johnson, and Arranged in Alphabetical Order”, p.218
James Hutton (1788*). “Theory of the earth; or an investigation of the laws observable in the composition, dissolution and restoration of land upon the globe. (From. the Trans., Roy. soc. of Edinb.).”, p.86