[37] ‘The Poultry Chronicle,’ vol. i. p. 89.
[38] ‘The Poultry Book,’ 1866, p. 210.
[39] Ibid. 1866, p. 167; and ‘Poultry Chronicle,’ vol. iii., 1855, p. 15.
[40] ‘A Treatise on Fancy Pigeons,’ by J. M. Eaton, p. 56.
[41] ‘The Pigeon Book,’ p. 46.
[42] ‘Das Ganze der Taubenzucht,’ 1837, s. 18.
[43] ‘Les Pigeons,’ 1824, p. 35.
[44] ‘Proc. Entomolog. Soc.,’ Aug. 6th, 1860, p. 126.
[45] ‘Journal of Horticulture,’ 1861, pp. 39, 77, 158; and 1864, p. 206.
[46] ‘Beiträge zur Kenntniss der Befruchtung,’ 1844, s. 366.