Intelligence and Cunning

Both the hero and villain rely on superior intellect, deduction, and strategic planning, with Don Luis unraveling complex plots through intuition and logic, while the antagonist uses ingenious mechanical traps and psychological manipulation.

Don Luis's clever escape from captivity and his strategic correspondence with Mornington demonstrate his resourcefulness and cunning.

Perenna deduces connections between the will, the tampered drawer, and the impending murders, showcasing his sharp intellect.

The missing diary and the murderer's ability to outwit Perenna and the police.

Perenna's quick thinking and investigative skills are contrasted with the trap set by the iron curtain, showcasing cunning on both sides.