“To attempt the taking of an Ornithological Census of these islands was a favourite idea of Mr. John Wolley's; so much so, indeed, that I believe he used to regard its accomplishment as the chief requirement of British ornithology. ... Two of the expressions which have lately become very familiar to the ears of naturalists are the "Struggle for Life," and "Preservation of Favoured Races" therein. Each of these points, as it seems to me, would be greatly elucidated by the carrying-out of Mr. Wolley's idea."”