Chapter IV is structured as a slow, atmospheric build toward a single shock: the glowing eyes of Montgomery's attendant. Wells carefully orchestrates the scene so that darkness and partial illumination become narrative tools. The binnacle lantern, the starlight, the waning moon's "ghostly white beam" — all create a chiaroscuro world in which full knowledge is perpetually withheld. This epistemological obscurity mirrors Prendick's position throughout the novel: he perceives fragments but cannot yet assemble them into meaning.
Montgomery's half-confession is a masterpiece of dramatic reticence. His disclosure that "eleven years ago — I lost my head for ten minutes on a foggy night" gestures toward a specific Victorian scandal (most likely a professional or sexual transgression) without naming it, leaving the reader, like Prendick, to exercise imagination. Prendick's calculated withdrawal — "Don't. It is all the same to me" — is a subtle power move, and Wells uses it to reveal that Prendick, despite his helplessness, is an astute social operator. The exchange also introduces the novel's recurring meditation on chance and determinism: Montgomery insists that everything in a man's life is chance, a proto-naturalist view that undercuts Victorian notions of moral agency and self-determination.
The attendant's eyes are the chapter's climactic image and its most potent symbol of the uncanny. The pale-green gleam is physiologically ambiguous — Prendick himself later concedes that luminous eyes are not unknown in humans — yet its effect is absolute: "That black figure with its eyes of fire struck down through all my adult thoughts and feelings, and for a moment the forgotten horrors of childhood came back to my mind." Wells is precise here: the horror is not rational but atavistic, bypassing the civilised intellect to reach something older. This anticipates the novel's central argument that the boundary between human and animal is thinner and more permeable than Victorian confidence supposed.
The puma, introduced earlier in the chapter as "a black heap in the corner of its cage" watching with "shining eyes," rhymes visually with the attendant's own shining eyes at the taffrail. Wells plants this parallel deliberately: both the caged beast and the silent figure are observed, contained, and not yet explained. The motif of watching and being watched — the puma, the attendant, Prendick himself peering at Montgomery's "odd, pallid face" — establishes a network of surveillance that will intensify on the island.
Finally, the chapter's closing image — the staghounds howling, the moon casting an "ominous shape," Prendick dreaming fitfully — employs Gothic atmosphere to signal that the rational daylight world is giving way to something more disturbing. The island, glimpsed only as "a low-lying patch of dim blue," remains a space of pure projection, onto which both Prendick and the reader are invited to cast their anxieties. Wells thus transforms a simple overnight anchorage into a threshold moment: the last night before the world Prendick knows becomes irrecoverable.