[8] Temminck, ‘Hist. Nat. Gén. des Pigeons,’ tom. i.; also ‘Les Pigeons’ par Mme. Knip and Temminck. Bonaparte, however, in his ‘Coup- d’œil’ believes that two closely allied species are confounded together under this name. The _C. leucocephala_ of the West Indies is stated by Temminck to be a rock-pigeon; but I am informed by Mr. Gosse that this is an error. [9] ‘Handbuch der Naturgesch. Vögel Deutschlands.’ [10] ‘Tagebuch, Reise nach Färo,’ 1830, s. 62. [11] ‘Annals and Mag. of Nat. Hist.,’ vol. xix., 1847, p. 102. This excellent paper on pigeons is well worth consulting. [12] ‘Natural History of Ireland,’ Birds, vol. ii. (1850), p. 11. For Graba _see_ previous reference. [13] ‘Coup-d’œil sur l’Ordre des Pigeons,’ ‘Comptes Rendus,’ 1854-55. [14] ‘Naturgeschichte. Deutschlands,’ Band. iv. 1795, s. 14. [15] ‘History of British Birds,’ vol. i. pp. 275-284. Mr. Andrew Duncan tamed a rock-pigeon in the Shetland Islands. Mr. James Barclay, and Mr. Smith of Uyea Sound, both say that the wild rock-pigeon can be easily tamed; and the former gentleman asserts that the tamed birds breed four times a year. Dr. Lawrence Edmondstone informs me that a wild rock-pigeon came and settled in his dovecot in Balta Sound in the Shetland Islands, and bred with his pigeons; he has also given me other instances of the wild rock-pigeon having been taken young and breeding in captivity. [16] ‘Annals and Mag. of Nat. History,’ vol. xix. 1847, p. 103, and vol. for 1857, p. 512. [17] Domestic pigeons of the common kind are mentioned as being pretty numerous in John Barbut’s ‘Description of the Coast of Guinea’ (p. 215), published in 1746; they are said, in accordance with the name which they bear, to have been imported.