[64]

Here the late Professor Roy's article on "Flight" (A. Newton, Dict. Birds, 1893, p. 260) may be consulted.

[65]

Ogilvie Grant, Ibis, 1896, p. 52.

[66]

Id. ibid.

[67]

Ibis, 1865, pp. 281, 282.

[68]

Harvie-Brown, Zoologist, 1894, p. 337-338.