Setting
So where and why on earth would ten famous Agatha Christie detectives be summoned to a remote island and be asked to portray characters from yet another Agatha Christie story?
What if it REALLY happened?
Suppose the BOOK version of ATTWN really happened. In the late summer of 1939, on a small island, off of the south coast of Devon, ten gruesome murders took place. Suppose ALL of those ten people were found dead a week later by the boatman, Fred Narracott? What if the murderer's plans went so perfectly well that they confounded Scotland Yard? The families of the victims would pressure the authorities to solve the crimes and bring the murderer to justice. With the wealthy Marston, Brent, and Wargrave families clamoring to claim or reassign inheritance from their deceased relatives, Scotland Yard would have to resort to drastic measures to solve the case.
But also understand what ELSE is happening in the world at this time. It's now late spring of 1940. Nine months have passed, and still no breaks have occurred in the case. Germany has invaded Poland and France, and Soldier Island is a prime scouting location for German aircraft crossing the Channel to bomb Britain. The Ministry of Defense seeks to claim the island, demolish the house, and build an R.A.F. lookout post there to assist in their growing battle against the Luftwaffe.
The pressure on Scotland Yard has just increased exponentially.
At the behest of the acting director for Scotland Yard's southwest sector, ten prolific detectives have been invited to the island to solve the case. Belgium's famous Mssr. Hercule Poirot, relocated now to London for wartime safety, tops the list of invitees. Accompanying him are Chief Inspector James Japp and Mr. Arthur Hastings, long time associates, as well as Ms. Ariadne Oliver, crime writer. Also high on the list is Miss Jane Marple, a brilliant forensic detective, accompanied by her nephew, mystery author Mr. Raymond West. Also invited are Miss Prudence "Tuppence" Cowley and Mr. Thomas "Tommy" Beresford, both formerly of London's famous International Detective Agency. Mr. Parker Pyne, Mr. Satterthwaite and his associate Mr. Harley Quin will also join the investigation.
The bounty on solving the murders is set at a hefty 10,000 pounds. The house has been sealed since evidence was taken in late October of 1939. An extensive collection of crime scene photographs has been captured, and is available to the detectives. Mr. West has been working with Scotland Yard to construct a timeline of events, and has compiled portfolios on the backgrounds of each of the victims. His account of the murders will serve as a baseline script as each detective takes on the role of one of the victims to re-enact the murders as they occurred. Mr. West has been granted exclusive rights to publish the story, once solved.
Given all of that, I had to find a likely locale for Soldier Island, as well as the fictional hamlet of Sticklehaven. The book suggests that the island is about a mile off of the coast, somewhere between Plymouth and Exeter. One character comments that they've not been to this part of Devon, so I sought to find an area remote enough to make that assertion plausible. Agatha Christie often vacationed on Burgh Island, a tidal island next to Bigbury, and it is believed to have been the inspiration for Indian/Soldier Island in the story. Burgh is to large and too close to land to fit the description, so I moved the fictional location further southeast along the coast to an area at the south end of Start Bay, just across the cape. Here is a mocked-up Google Map of where Sticklehaven and Soldier Island would be...

And for reference, here is a small map of the South Hams area for reference. The island would be on the small, southerly tip, in the bottom center, to the east of East Prawle...

