The Cayman Couple’s Criminal Partnership
Why Didn't They Ask EvansThe Caymans assist Roger and Moira by disguising Alan Carstairs’s identity, attempting to silence Bobby, and disappearing when suspicion rises.
increasing
Bearing strength in each event
decreasing
A Convenient Brother

A Convenient Brother
A ready-made identity
Amelia Cayman claims that the dead man is her brother Alex Pritchard, recently returned from abroad. Leo Cayman supports her appearance of grief and helps establish the story.
The camouflage holds
Their testimony, the substitute portrait, and a story about misdirected luggage make the identity seem ordinary. The investigators initially have no recognized relative to challenge it.
A Question About Last Words

A Question About Last Words
Concern disguised as grief
The Caymans visit Bobby and ask whether the dying man left a message. Their interest exceeds what simple condolences require, but Bobby does not yet understand why it matters.
A warning overlooked
Bobby initially says the man spoke nothing, then sends a correction about Evans. That correction makes the conspirators fearful that the dead man has disclosed something dangerous.
The Offer and the Poison

The Offer and the Poison
A planned removal
Bobby receives a lucrative overseas job offer, then survives a morphia-laced beer. Frankie connects the two attempts as efforts to remove him from the investigation.
The conspiracy broadens
The attacks suggest that someone can arrange both employment and poison with unusual ease. The Caymans’ earlier concern over the last words makes them central suspects even before the full network is known.
A Disappearing Address

A Disappearing Address
A rented house abandoned
Frankie visits 17 St Leonard’s Gardens and finds the Cayman residence empty. House agents explain that the tenancy was short and that the couple left without a forwarding address.
A trail that thins
The absence of papers suggests deliberate care rather than innocence, but gives Frankie little immediate evidence. An open railway guide provides the only possible route to the couple’s next location.
Partnership Revealed

Partnership Revealed
Multiple identities
Roger explains that the man known as Cayman was part of the criminal circle and that Moira used the name Mrs Templeton. The couple helped turn the death of Alan Carstairs into the supposed accidental death of Alex Pritchard.
A wider enterprise
The false identification protected the Savage fraud and the people involved in it. The Caymans’ role shows how the conspiracy depended on coordinated aliases and rapid disappearance.
At the inquest into the cliff death
The day after the inquest
Several days after Bobby’s correction
During Frankie’s investigation in London
Near the end, through Roger’s letter