[80] See clear evidence on this head in the two works so often quoted, by Brehm and Rengger.
[81] See remarks on this head by Dr. Maudsley, ‘The Physiology and Pathology of Mind,’ 2nd edit. 1868, p. 199.
[82] Many curious cases have been recorded. See, for instance, 'Inquiries Concerning the Intellectual Powers,’ by Dr. Abercrombie, 1838, p. 150.
[83] ‘The Variation of Animals and Plants under Domestication,’ vol. ii. p. 6.
[84] See some good remarks to this effect by Dr. Maudsley, ‘The Physiology and Pathology of Mind,’ 1808, p. 199.
[85] Macgillivray, ‘Hist. of British Birds,’ vol. ii. 1839, p. 29. An excellent observer, Mr. Blackwall, remarks that the magpie learns to pronounce single words, and even short sentences, more readily than almost any other British bird; yet, as he adds, after long and closely investigating its habits, he has never known it, in a state of nature, display any unusual capacity for imitation. ‘Researches in Zoology,’ 1834, p. 158.
[86] See the very interesting parallelism between the development of speech and languages, given by Sir C. Lyell in ‘The Geolog. Evidences of the Antiquity of Man,’ 1863, chap. xxiii.
[87] See remarks to this effect by the Rev. F. W. Farrar, in an interesting article, entitled “Philology and Darwinism” in ‘Nature,’ March 24th, 1870, p. 528.
[88] ‘Nature,’ Jan. 6th, 1870, p. 257.
[89] Quoted by C. S. Wake, ‘Chapters on Man,’ 1868, p. 101.