Elizabeth Penn

In the short story Double Sin, Elizabeth Penn ran an antique shop in the town of Ebermouth in Devon. According to her niece Mary Durrant, Elizabeth had been left in very reduced circumstances after the death of her father. She had used her small capital and the house full of collectibles which her father had left her to start her shop and had been very successful.

Poirot later learnt the truth that the business was in a very bad state which probably explained why Elizabeth had conspired with her niece to defraud an American tourist who was interested in buying a set of valuable miniatures.

Elizabeth Penn was described as "a shrinking elderly lady with a pink-and-white complexion".

Portrayals
Elizabeth Penn was played by Elspet Gray in the film adaptation of Double Sin in Series 3 of ITV's Agatha Christie's Poirot drama series. Here the character is seen in a wheelchair most of the time but shows during the denouement that she can run.