Appearance vs. Reality

The book repeatedly shows how outward appearances (Claggart's pleasant words, the official naval report) mask hidden motives, malice, or truth, suggesting that reality is often deceptive and that surface-level judgments can be dangerously misleading.

The islands appear fixed and stable yet are subject to shifting currents and deceptive navigation, and the tortoises seem to embody a curse that may be mere superstition.

The tortoises are described as having both a dark, melancholy back and a bright, golden underside, illustrating the theme that things are not simply one way but possess dual aspects.

Rock Rodondo is frequently mistaken for a ship from afar, only to reveal itself as a barren rock upon approach, underscoring the deceptive appearances in the Encantadas.

The mirages and deceptive forms of the islands, such as Cowley's Enchanted Isle appearing as a ruined fortification or a great city, highlight the theme of appearance versus reality.