The Whale as Phrenological Puzzle
Chapter 80 of Moby-Dick by opens with Ishmael declaring that while the sperm whale's face resembles a Sphinx in its inscrutability, its brain presents an even deeper mystery to the phrenologist — "that geometrical circle which it is impossible to square." The skull of a full-grown sperm whale measures at least twenty feet in length, yet the actual brain occupies a cavity "seldom exceeding ten inches in length and as many in depth," hidden at least twenty feet behind the animal's apparent forehead. Ishmael compares this tiny organ to the innermost citadel of Quebec, concealed behind "vast outworks." Some whalemen refuse to believe the creature even possesses a true brain, preferring to regard the cubic yards of spermaceti in the whale's "magazine" as the real seat of its intelligence.
The False Brow and Phrenological Delusion
Ishmael declares that any attempt to read the whale's character from its outward skull shape is futile: "phrenologically the head of this Leviathan, in the creature's living intact state, is an entire delusion." The massive junk and sperm fill in the skull's inclined plane, creating a misleading exterior that reveals nothing about the brain beneath. This leads Ishmael to one of the chapter's most striking aphorisms: "The whale, like all things that are mighty, wears a false brow to the common world." The line extends well beyond cetology, suggesting that true power and intelligence are always hidden from casual observation, concealed behind imposing but deceptive facades.
The Reversed Skull and Missing Virtues
In a surprising twist, Ishmael notes that if you strip the sperm whale's skull of its spermy heaps and view it from the rear, it bears a striking resemblance to a human skull seen from the same angle. Placed among human skulls (scaled down to human size), it would be indistinguishable — except that a phrenologist would observe depressions indicating "no self-esteem, and no veneration." Rather than diminishing the whale, Ishmael suggests these "negations," combined with the whale's "prodigious bulk and power," offer the truest conception of "what the most exalted potency is" — a power that needs no self-regard or reverence because it simply is.
The Spinal Theory and the Whale's Indomitable Hump
Unsatisfied with conventional phrenology, Ishmael proposes an alternative: a "spinal branch of phrenology." He observes that vertebrae resemble miniature skulls — a "German conceit" he illustrates with the story of a foreign friend who inlaid a canoe prow with the vertebrae of a slain enemy. Ishmael argues that "much of a man's character will be found betokened in his backbone" and declares, "I would rather feel your spine than your skull, whoever you are." Applied to the sperm whale, this theory redeems the creature's seemingly inadequate brain: its spinal cord remains nearly as thick as the brain itself for many feet, and the spinal canal begins at a massive ten inches across. Finally, Ishmael identifies the whale's great hump — rising over one of the larger vertebrae — as "the organ of firmness or indomitableness," closing with the ominous promise that the crew will soon learn firsthand how indomitable the great whale truly is.