"Mrs Welman, whose money went to Elinor Carlisle, was murdered by morphine; Mary Gerrard, who stood between Elinor Carlisle and her fiance, was murdered by morphine. And nobody in the world had the slightest motive to commit these murders other than the accused; no one had the slightest opportunity other than the accused."Murder mystery novel by Agatha Christie. Elinor Carlisle seems to be the only possible suspect for the murders of her wealthy aunt, Laura Welman, and her romantic rival, Mary Gerrard. However, doctor Peter Lord, who is in love with Elinor, asks Hercule Poirot to clear her name, insisting she can't be guilty, despite the overwhelming evidence to the contrary. Hercule Poirot points out that there's an extremely strong case against her, but still he agrees to investigate the case and find out the truth.The novel opens with a prologue where we get to see part of Elinor's trial and follow some of her thoughts, and proceeds with a series of flashbacks which tell the story in three parts. It contains Courtroom Drama; it's one of the two times Christie used the lovely-woman-in-the-docks plot (the other being Five Little Pigs, to a much lesser extent.) Interestingly, instead of having a Summation Gathering, the solution is presented at court at the end of the book. The novel has been criticized for its abrupt ending and lack of plausible suspects, but it has received positive reviews as a suspenseful and well-written detective story.The novel has been adapted for radio in 1992 by BBC Radio 4 with John Moffat as Poirot. It has also been adapted for TV by London Weekend Television as part of the ninth season of Poirot starring David Suchet as Poirot and Elizabeth Dermot-Walsh as Elinor Carlisle. Tropes for the TV adaptation can be found on the page for the series.
— Prosecuting attorney, Sad Cypress (TV adaptation)
Warning: unconcealed spoilers ahead.
Sad Cypress contains examples of:
- All Love Is Unrequited: Dr. Lord is in love with Elinor, who's in love with Roddy. Roddy is fond of Elinor but has fallen head-over-heels for Mary Gerrard. Mary finds Roddy's attentions annoying and keeps telling him to go back to Elinor. Meanwhile, Mary has Ted, her boyfriend in the village. She likes him but has ambitions that are likely to take her away from him. (However, after about two hundred and fifty pages of this, a subversion is implied in the end with Elinor and Dr Lord. D'aw.)
- The Butler Did It: No, seriously. Well, not an actual butler, but still.
- Childhood Friend Romance: Elinor and Roddy practically grew up together (as cousins), and were later engaged.
- Clear Their Name: Poirot is hired by Peter Lord to prove that Elinor is innocent. Although skeptical in light of the clear evidence against Elinor, Poirot's investigations do eventually lead him to become convinced of her innocence.
- Courtroom Drama: A rarity in the works of Agatha Christie, in which we see the trial of an alleged killer.
- Emotionless Girl: Elinor often behaves aloof, detached and coldly logical, but hides intense passion within herself.
- Frameup: Peter Lord is convinced this is happening to Elinor. He turns out to be right.
- Funny Foreigner: More so than in other Poirot books. He has to fake an interest in the royal family to get one of the villagers to talk to him.
- Green-Eyed Monster: Miss Carlisle is not above this.
- I Gave My Word: Elinor promised her aunt Laura that she would see to it that a provision was made for Mary Gerrard in Laura's will. When Aunt Laura died before she could write a will, Elinor made sure that a suitable amount of money was given to Mary.
- Inheritance Murder: This is the obvious motive for Elinor Carlisle to have committed the murder she's accused of. Naturally, the relationships in play turn out to be more complicated. However, in the end, this is actually the motive... just several steps more removed.
- I Want My Beloved to Be Happy: While still deeply in love with him, Elinor breaks up with Roddy and gives him relationship advice about Mary.
- Karma Houdini: The killer, Nurse Hopkins, flees the trial when it looks like their scheme is about to be exposed.
- Kissing Cousins: Though not related by blood, Elinor is the daughter of Laura Welman's brother, while Roddy was the nephew of her late husband, and the two were raised as cousins. Roddy lampshades this by pointing out that they have all the advantages of being cousins without the potential downsides of a blood relationship.
- Love Makes You Crazy:
"Does it matter? She might have done it, yes! I don't care if she did. [...] But I don't want her hanged, I tell you! Suppose she was driven desperate? [...] Haven't you got any pity?"
- Peter Lord. Just listen to him.
- Also true of Elinor's love for Roddy and implied about Mrs. Welman's experiences. The one thing love definitely does not make anyone in this book is happy.
- It's also heavily implied that Elinor actually was planning to murder Mary after her heart was broken, only to come to her senses before she could pull it off. Unfortunately for Elinor, someone else was also gunning for Mary and didn't have such a strong conscience...
- Love at First Sight:
- Roddy meets the grown up Mary when he and Elinor was visiting his aunt and becomes immediately smitten with her that he breaks off his engagement with Elinor.
- Likewise, Dr Lord saw Elinor for the first time during that visit, and fell so hard in love with her that he hired Poirot to clear her name despite having no solid evidence to suggest that the girl was not guilty. The series averts this by having Elinor and the doctor know each other beforehand — and Dr Lord was the only other person apart from Roddy to whom Elinor showed the anonymous letter.
- Love Hurts: Elinor discusses about love with Laura Welman, who agrees that love often brings more sadness than joy.
- Love Triangle: Elinor loves Roddy who falls for Mary (who is seeing Ted, but it's implicated that there's no future there).
- Luke, I Am Your Father: The revelation that Mary isn't actually Gerrard's daughter. Followed by the revelation that she is Mrs. Welman's daughter. And that the nurse is actually Mary's aunt.
- Mercy Kill: One potential motive given for why Elinor might have killed her aunt; she knew that her aunt wouldn't have wanted to live crippled by the second stroke.
- Murder the Hypotenuse: The reason why Elinor was considered the prime suspect of the murder is because her fiance broke of her engagement to go after Mary, and to the prosecution, her jealousy is the only reason why anyone would want to harm such a nice, likable kid.
- Never One Murder: Mary Gerrard died of morphine poisoning after the death of Laura Welman, whose death was first thought to be of natural causes. Further investigation revealed that Mrs. Welman was also poisoned by morphine shortly after her second stroke attack.
- Never Speak Ill of the Dead: Mrs Bishop lectures Poirot about respecting the dead and how she can not possibly judge the dead Mary Gerrard, but then she somehow manages to make him understand exactly what she thought of her.
- Not So Stoic: Elinor is initially portrayed as a stoic, unemotional ice queen, but as she and Roddy are characterised in more detail it becomes clear that she is actually the more caring and emotional of the two.
- Plot Hole: If Nurse Hopkins wanted to murder Mary and frame Elinor for the murder, then it doesn't make sense to offer the poisoned tea to Elinor as well; Elinor would have died, too, which would have been extremely risky and there would have been no one to frame.
- The TV adaptation seals up the hole by Elinor stating publicly that she doesn't drink tea; she prefers coffee. Ironically, this brings up a question in itself since the prosecution alleged that Elinor poisoned either the tea or the sandwiches, why didn't Elinor's lawyer point out as part of her defence that Nurse Hopkins didn't die from eating and drinking the same things as Mary, which would imply that Mary was poisoned elsewhere - or ask why that was so?
- Pull the Thread: Poirot is set on the right path when a character tells a seemingly pointless lie.
- Referenced by: William Shakespeare: This title is taken from the Clown's song from Twelfth Night (II, iv).
- Rock Bottom: When Poirot warns Dr. Lord that he will reveal any evidence he finds in the investigation, even if it makes the case against Elinor look worse, Dr. Lord informs him that the case against Elinor can't possibly get any worse.
- Satiating Sandwich: Elinor makes salmon paste sandwiches for Mary. Subverted at first when it is apparent that Elinor has poisoned the sandwiches, but then Double-Subverted when it turns out via Poirot's taste-test that the sandwiches were actually harmless and that it was the actual suspect who poisoned the tea.
- She Is All Grown Up: Mary Gerrard was described by Roddy as a "scrawny kid with lots of messy hair" in her childhood, and it's clear that he doesn't think of her attractive then. At 21 years old, Mary was a very beautiful woman who causes Roddy to fall in Love at First Sight with her.
- Who Murdered the Asshole?: Inverted. Both Laura Welman and Mary Gerrard are sympathetic characters, Mary verging on the angelic. The main reason Elinor is accused apart from the evidence, is that nobody else would even seem to have a motive for killing such nice people in the first place.
- Wrong Guy First: Elinor is passionately in love with Roddy, and the two are initially engaged, but he neither loves her as intensely as she does and, in many ways, doesn't quite deserve her love. The ending implies that Elinor will eventually find love and happiness with Peter Lord, the loyal doctor who has constantly admired and defended her from afar.