without any peculiar or distinguishing faculty of its own, is, as it
were, a bundle or compound of faculties of other animals, by a
distinct enumeration of which any individual of the species may be
satisfactorily described. This is manifest, even in the ordinary
language of conversation, when, in summing up, for example, the
qualities of an accomplished courtier, we say he has the vanity of a
peacock, the cunning of a fox, the treachery of an hyaena, the
cold-heartedness of a cat, and the servility of a jackal. That this is
perfectly consentaneous to scientific truth, will appear in the
further progress of these observations.

"Every particular faculty of the mind has its corresponding organ in
the brain. In proportion as any particular faculty or propensity
acquires paramount activity in any individual, these organs develope
themselves, and their development becomes externally obvious by
corresponding lumps and bumps, exuberances and protuberances, on the
osseous compages of the occiput and sinciput. In all animals but man,
the same organ is equally developed in every individual of the
species: for instance, that of migration in the swallow, that of
destruction in the tiger, that of architecture in the beaver, and that
of parental affection in the bear. The human brain, however, consists,
as I have said, of a bundle or compound of all the faculties of all
other animals; and from the greater development of one or more of
these, in the infinite varieties of combination, result all the
peculiarities of individual character.

"Here is the skull of a beaver, and that of Sir Christopher Wren. You
observe, in both these specimens, the prodigious development of the
organ of constructiveness.