[Footnote 83: i.e., Lyell says: Present causes could give these effects, given the time. Laing says: Therefore, since they have given these effects, we must suppose the time.]
[Footnote 84: P.F. 18]
[Footnote 85: P.F. 74.]
[Footnote 86: Ibid.]
[Footnote 87: P.F. 20.]
[Footnote 88: M.S. 34, 41.]
[Footnote 89: P.F. 6.]
[Footnote 90: P.F. 23.]
[Footnote 91: M.S. 46.]
[Footnote 92: P.F. 24.]