[14] To Wilson, April 29, 1878, More Letters, vol. II, p. 421.
[15] To Galton, November, 1879, Life, vol. II, p. 414.
[16] To Lyell, March 17, 1863, Life, vol. II, p. 201.
[17] To Galton, November 8, 1872, More Letters, vol. II, p. 108.
[18] Expression, p. 184.
[19] To Dr. Ogle, March 12, 1871, Life, vol. II, p. 321.
[20] More Letters, vol. I, p. 4.
[21] To Jenyns, October 17, 1846, Life, vol. I, p. 396.
[22] Beagle Journal, p. 282.
[23] To Gray, June 3, 1874, Life, vol. II, p. 457.