Appearance vs. Reality

Characters frequently present false fronts—such as the seemingly harmless hotel guests or the staged theft at Foxhills—while the truth is hidden behind alibis, planted evidence, and misleading clues.

Sir Clinton's careful observation of Cressida's hidden mistrust and Mme. Laurent-Desrousseaux's hard exterior suggests deeper truths beneath surface appearances.

The discovery of valuable silver in the caretaker's drawer contrasts with his simple, honest reputation.

Cressida's earlier carefree demeanor contrasts sharply with her fearful and desperate behavior during the interrogation, and the letter suggests a hidden life.

The beach digging appears to be a serious search but is actually a ruse; Cargill's shooting may be a case of mistaken identity.