Spoiler warning: this post explains the full ending of I Capture the Castle. If you have not finished the book, stop here and come back later.
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Quick answer: Cassandra Mortmain realizes she loves Simon Cotton, but her sister Rose runs off with Simon's brother Neil instead of marrying Simon. Simon leaves for America, promising to come back, and Cassandra ends her journal by writing that she loves him, unsure whether he will return.
Quick facts
– Book: I Capture the Castle by Dodie Smith
– First published: 1948
– Type: A coming-of-age novel
– Tone of the ending: Bittersweet and hopeful
Table of Contents
What Leads Up to the Ending
Seventeen-year-old Cassandra lives in a crumbling English castle with her eccentric, blocked writer father, her glamorous sister Rose and their stepmother Topaz. The family is penniless until the wealthy American Cotton brothers inherit the nearby estate. Rose sets out to marry Simon for his money, and Cassandra fills her journal with everything that happens.
What Happens at the End of I Capture the Castle
Cassandra and Simon share a kiss on Midsummer Eve, and she realizes she has fallen in love with him. The sisters lock their father in a tower, hoping to force him to write again, and it works. Then Rose admits she loves Neil, not Simon, and elopes with him. Simon kindly offers Cassandra a future, but she knows he still loves Rose and lets him go. As he sails to America, she writes in her journal, “I love you.”
The Ending in 4 Quick Points
- Rose chooses love over money.
- Cassandra's honesty means she refuses Simon for now.
- Her father begins writing again.
- The journal ends on an open note.
What Happens to the Main Characters
| Character | What happens to them |
|---|---|
| Cassandra Mortmain | Hopes Simon will return |
| Rose Mortmain | Elopes with Neil Cotton |
| Simon Cotton | Leaves for America |
| Stephen Colly | Goes off to act in films |
| James Mortmain | Writes his long-awaited new book |
What the Ending Means
The ending marks Cassandra's move into adulthood. She learns that love can hurt and that she cannot “capture” people as easily as she captures moments on paper.
Other Ways to Read the Ending
Some readers think Simon will come back, while others think the point is that Cassandra will be fine either way. The open ending is one reason the book is so loved.
Themes the Ending Brings Together
Growing up. Cassandra's journal records her change from girl to young woman.
Love. The novel shows love that is unequal and complicated.
Writing. Both Cassandra and her father find their voices.
Is the Ending Happy or Sad?
Most readers describe the ending of I Capture the Castle as bittersweet and hopeful. How you feel about it usually depends on what you hoped for the characters and what you expected Dodie Smith to do with the story, so it is worth asking friends how they felt before you compare notes.
Who Will Like This Ending
Readers who enjoy endings that are bittersweet and hopeful will find a lot to talk about here. If you prefer every thread tied up neatly, it helps to know in advance how Dodie Smith closes the story, which is exactly why many readers look it up. Either way, the final chapters reward a second look once you know where everything is heading, because small details from the middle of the book start to matter. If you are reading with a group, agree beforehand whether everyone has finished, so nobody has the last chapters spoiled.
Book Versus Adaptation
The 2003 film ends with a similar open, hopeful note.
Discussion Questions About the Ending
If you are reading I Capture the Castle with a book club or a friend, these questions work well once everyone has finished:
- Did the ending surprise you, or had you seen it coming from the first chapters?
- What does the final scene say about growing up, and do you agree with Dodie Smith's view?
- Which character made the most important choice in the last part of the book, and was it the right one?
- How would the story feel if it had ended one chapter earlier or one chapter later?
- Does the ending leave you hopeful about the characters, or do you worry about what comes next?
- Would you describe the ending as bittersweet and hopeful, or would you choose a different word?
How to Read the Final Chapters Again
- Compare the opening with the close. Look at how the first chapter introduces growing up and how the ending answers it.
- Track each final choice. The table above shows where every main character ends up, so ask which of those outcomes was earned.
- Notice what Dodie Smith leaves unsaid. Gaps in the last pages are often deliberate, and they are where most of the debate about the ending begins.
- Listen for echoes. Images, phrases or settings from earlier in I Capture the Castle often return in the final scene with a new meaning.
Questions to Ask Yourself After Finishing
- Was the ending of I Capture the Castle earned by what came before it, or did it feel sudden?
- Which character's final moment affected you most, and why?
- If you could change one thing about the last chapters, what would it be?
- Did the ending change how you think about the opening pages?
Check price of I Capture the Castle on Amazon
Books to Read After I Capture the Castle
- Pride and Prejudice by Jane Austen
- Cold Comfort Farm by Stella Gibbons
Related: I Capture the Castle by Dodie Smith: Summary and Key Takeaways · 15 Books Like I Capture the Castle You’ll Love
Frequently Asked Questions
What happens at the end of I Capture the Castle?
Cassandra Mortmain realizes she loves Simon Cotton, but her sister Rose runs off with Simon's brother Neil instead of marrying Simon. Simon leaves for America, promising to come back, and Cassandra ends her journal by writing that she loves him, unsure whether he will return.
Is the ending of I Capture the Castle happy or sad?
Most readers call it bittersweet and hopeful.
What does the ending of I Capture the Castle mean?
The ending marks Cassandra's move into adulthood.
Is the ending of I Capture the Castle the same in the adaptation?
The 2003 film ends with a similar open, hopeful note.
Who wrote I Capture the Castle and when was it published?
I Capture the Castle was written by Dodie Smith and first published in 1948.
Is I Capture the Castle worth reading if I already know the ending?
Yes, especially if you enjoy coming-of-age novels. Knowing the ending can make a first read richer, because you notice how Dodie Smith prepares for it from the opening chapters.
Should I read I Capture the Castle before reading the ending explained?
Yes, if you plan to read it, because this post gives away the whole ending.