[958] Darwin, ‘The Descent of Man,’ vol. ii. p. 257.
[959] Martin, loc. cit. vol. ii. p. 174. Cf. Fritsch, loc. cit. p. 445 (Bushmans).
[960] Hooper, loc. cit. p. 390.
[961] Powers, loc. cit. pp. 238, et seq.
[962] Spencer, ‘The Principles of Sociology,’ vol. i. pp. 601, et seq.
[963] Wilkes, loc. cit. vol. v. p. 90.
[964] Klemm, loc. cit. vol. ii. p. 207.
[965] Spencer, ‘The Principles of Sociology,’ vol. i. p. 64.
[966] Emerson Tennent, loc. cit. vol. ii. p. 443.
[967] Hawkesworth, ‘Voyages,’ vol. ii. p. 55.