[40] Subsequent experience has shown that, while the above observations are beyond all question in the case of ordinary sedimentary rocks, structures curiously resembling lamination and ripple-mark may be produced in certain gneisses and crystalline schists by other causes. Still, in many schists, they have originated in the way suggested by Lyell, and indicate that the rock formerly was deposited by water.
[41] Life, Letters, and Journals, vol. i. p. 303.
[42] Ut suprà, p. 305.
[43] Life, Letters, and Journals, vol. i. p. 313.
[44] The Rev. W. D. Conybeare, afterwards Dean of Llandaff, an eminent geologist, rather senior to Lyell.
[45] Life, Letters, and Journals, vol. i. p. 316.
[46] It was formerly conceded by the Universities of Oxford, Cambridge, and Dublin that a Master of Arts in any one could assume, under certain conditions, the same position in the others. This carried with it some privileges, though not the suffrage and the full rights of the degree. Lyell had proceeded to the degree of M.A. at Oxford in 1821.
[47] Life, Letters, and Journals, vol. i. p. 318.
[48] Life, Letters, and Journals, vol. i. p. 328.
[49] Ut suprà, p. 329. By the end of October it had not only ceased to grow, but also had been nearly washed away by the sea. Now its position is marked by a shoal.