[31] ‘Origin of Species,’ p. 268.
[32] ‘Good Words for the Young,’ June 1870. Animal Defences. By A. W. Drayson.
[33] Wallace, ‘Essays on Natural Selection,’ p. 227.
[34] ‘The Spectator,’ No. 120.
[35] ‘Spectator,’ No. 121.
[36] Nos. 156, 157.
[37] ‘Spectator,’ No. 519.
[38] ‘Natural History,’ § 985. ‘It is a common experience that dogs know the dog-killer; when, as in times of infection, some petty fellow is sent out to kill the dogs; and that though they have never seen him before, yet they will all come forth, and bark and fly at him.’
[39] See ‘Knight’s Half-Hours with the Best Authors.’ No. 185: from ‘The Fool of Quality.’
[40] ‘Essays on Natural Selection,’ p. 248.