[807] 'Hist. des Anomalies,' tom. i. p. 674.
[808] Quoted by Isid. Geoffroy, idem, tom. i. p. 635.
[809] 'The Poultry Book,' by W. B. Tegetmeier, 1866, p. 250.
[810] A. Walker on Intermarriage, 1838, p. 160.
[811] 'The Farrier and Naturalist,' vol. i., 1828, p. 456.
[812] Godron, 'Sur l'Espèce,' tom. ii. p. 217.
[813] 'Quadrupèdes du Paraguay,' tom. ii. p. 333.
[814] On Sheep, p. 142.
[815] 'Ueber Racen, Kreuzungen, &c.,' 1825, s. 24.
[816] Quoted from Conolly, in 'The Indian Field,' Feb. 1859, vol. ii. p. 266.