Page 228. " You're the one who wants to go into the lion's den "
Daniel's Answer to the King by Briton Rivière, R.A. 1890
Public DomainDaniel's Answer to the King by Briton Rivière, R.A. 1890

The term "the lion's den" comes originally from the Old Testament story of Daniel, who was thrown into a Babylonian pit of lions for his faith but was protected by God from their hunger: Book of Daniel, chapter 6.

Page 230. " an escaped inmate of Broadmoor "

Broadmoor Hospital (formerly known as Broadmoor Criminal Lunatic Asylum) is a psychiatric hospital in Berkshire, England. It first opened in 1863.

The video below is a news report about Broadmoor. It contains images that some may find disturbing.

 

 

 

Page 231. " from the Supreme Court "
Supreme Court, Washington, DC, USA
Permission Granted by Copyright Owner for Use on Book DrumSupreme Court, Washington, DC, USA - Credit: Steve Skaggs

The Supreme Court is the highest court in the United States. It is located in Washington, DC; its judges are differentiated from lower court judges by being referred to as "justices."

I am unable to locate the story to which Vera is referring. Contact the editor if you can do so. It may simply be a Christie invention.

 

Washington, District of Columbia, USA
Creative Commons Attribution Share AlikeWashington, District of Columbia, USA - Credit: Kmf164-maps
Page 233. " You know, like a Priest's Hole in old manor houses "
Priest hole concealed in a cupboard
Public DomainPriest hole concealed in a cupboard

A Priest hole was a hiding place built into a Roman Catholic house during the period when Catholics were persecuted in England. 

Families still loyal to Rome could conceal a Catholic priest for months, protecting him from searches ordered by Queen Elizabeth I and her successors.

 

The concealed entrance to a priest hole in Partingdale House, Middlesex (in the right column)
Public DomainThe concealed entrance to a priest hole in Partingdale House, Middlesex (in the right column)

 

 

 

 

 

 

 

 

You can watch a video showing the Naworth Castle priest hole here.

Page 243. " He got married and then there were none. "

This alternate version of the last verse is the version Christie used when turning And Then There Were None into a stage drama. It was also used in the film versions.

Page 248. " Man called Morris. Isaac Morris. "

If the name "Isaac Morris" seems familiar, there's good reason. The mysterious Mr. Morris was mentioned previously on pages 6 ("Mr. Isaac Morris had shaken his little bald head very positively. 'No, Captain Lombard, the matter rests there.'") and 25 ("Funny it was, thought Fred [Narracot], that he'd never yet set eyes on Owen--or his Missus either. Never been down here yet, he hadn't. Everything ordered and paid for by that Mr. Morris.")

Page 248. " that share-pushing fraud "

Christie may have had in mind these events as reported in the book Criminal Justice and Social Reconstruction.