Mona Mars’s Concealment
The Big SleepMona Mars’s disappearance is revealed as a staged refuge designed to protect Eddie Mars and confuse the search for Regan.
increasing
Bearing strength in each event
decreasing
Two Disappearances

Two Disappearances
A suspicious coincidence
Terence Regan disappears, and Mona Mars also vanishes from her usual life. The timing creates a persuasive rumor that they have run away together.
A useful explanation
Because Eddie Mars and Regan have personal connections through Mona, the rumor directs suspicion toward a romantic escape. It also gives the police a simple account to pursue.
A False Trail

A False Trail
The abandoned vehicle
Police find Terence Regan’s car at Casa de Oro while Mona remains missing. The evidence reinforces the impression that she and Regan left together.
Questions left open
Captain Gregory cannot establish what happened after Regan’s departure. The car is a clue, but not proof of a shared journey.
A Hidden Woman

A Hidden Woman
The paid discovery
Agnes Lozelle tells Philip Marlowe that Mona Mars is living in a hideout near Realito. Her account undermines the assumption that she disappeared with Terence Regan.
A deliberate concealment
Mona is not missing in the ordinary sense; she has been kept out of sight. Her location makes Eddie Mars’s role in the disappearance more difficult to ignore.
The Guarded Hideout

The Guarded Hideout
A controlled refuge
Philip Marlowe finds Mona Mars at the house beside Art Huck’s garage. Lash Canino controls access and has recently attacked Marlowe.
A willing disguise
Mona explains that she changed her appearance and stayed hidden to demonstrate loyalty to Eddie Mars. Her concealment is not simple captivity, though it is shaped by fear and devotion.
The False Runaway Story

The False Runaway Story
A confession of motive
Mona insists that she has not seen Terence Regan in months and that he did not run away with her. Her hiding has helped make the false story believable.
The unresolved truth
The confession weakens the police theory but does not reveal Regan’s fate. Marlowe understands that Mona’s concealment serves Eddie’s interests, even as she insists he is innocent.
mid-September, before the novel’s opening
after Regan’s car is found
after Harry Jones’s offer
the rainy night Marlowe reaches Realito
after the Realito confrontation