Susan Cardwell

In the novella Dead Man's Mirror, Susan Cardwell was the girlfriend of Hugo Trent, the nephew of Gervase Chevenix-Gore. She told Poirot that she had come down to Hamborough Close to "spy out the land", that is, to see if there was any realistic prospect of her and Hugo getting married even though his uncle wanted him to marry Ruth Chevenix-Gore.

Susan Cardwell was described as a rather good looking girl with red hair, "not strictly good-looking, but possessing an attraction that a merely pretty girl might envy." Her hair was magnificent and she had an intelligent face which was skilfully made-up with watchful eyes.

Portrayals
Susan Cardwell is played by Tushka Bergen in the film adaptation of the original story in Series 5 of ITV's Agatha Christie's Poirot. She came down to Hamborough Close on the same train as Poirot and Hastings. She tells them that she is Hugo's fiancee and that they definitely want to get married. This would have gone against his uncle's wishes as he wanted him to marry Ruth.