A great naturalist, as well as I can make out, is a man whose capacious skull allows of his being on the alert to a hundred different things at once, this same alertness being connected with a power of seeing the relations between different complicated sets of phenomena when they are presented in their entirety.

In: A.G. Sedgwick, The 19th Century: A Review of Progress During the Past One Hundred, Years in the Chief Departments of Human Activity, The Century's Great Men in Science (p. 321)