Sibling Bonds as Mirror and Trap: Theme Analysis in Catriona Ward's Sundial
The Mirror of Twins: Rob and Jack at Sundial
The thematic claim at the heart of Sundial is that sibling bonds operate as both a mirror and a trap: sisters reflect each other's deepest selves, yet that reflection binds them to cycles of violence, sacrifice, and devotion that become nearly impossible to break. Catriona Ward explores this through two generations of sisters—Rob and Jack, and Rob's daughters Callie and Annie—showing how the same pattern repeats across time and place.
The first and most explicit mirror is the twin bond between Rob and Jack. As children at Sundial, they are described as “the closest two people can be, without being one person” (chapter 13). Their shared trauma—being raised in a cage, the abuse they endured, and the experimental “click” that conditioned them—makes them almost extensions of each other. Rob's identity is defined in opposition to Jack: she is the “good one,” the obedient daughter, while Jack is the rebellious, unpredictable one. Yet the mirror reveals that this division is false. When Rob learns that she, not Jack, was the one who attacked their adoptive mother with wire as a child, she realizes she is not inherently good; she is capable of the same violence she condemns in her sister (chapter 27). The mirror shows her a self she cannot accept, and this knowledge becomes a trap: she cannot escape the fear that she is like Jack, or that Jack's fate will be hers.
The trap aspect is most evident in Jack's decision to run away from Sundial. Rob feels abandoned, and her resentment festers. In chapter 16, Rob tells on Jack for her strange behavior, hoping to bring her back into line, but the act only deepens the rift. Jack's escape is both a liberation and a condemnation for Rob, who is left to wonder why she was not chosen to leave. The mirror here is distorted: Rob sees Jack as the one who got away, but Jack's freedom is illusory—she is still bound to Sundial and to Rob. When Jack returns years later, she warns Rob not to marry Irving, but Rob dismisses her, and the trap closes: Rob's marriage leads to the very destruction Jack foresaw. The bond is a trap because neither sister can fully separate from the other; their lives are intertwined in ways they cannot control.
The Trap of Protection: Callie and Annie
The second generation repeats the pattern with Callie and Annie. Callie's narration in chapter 11 reveals her belief that she must discipline Annie “for her own good.” She sees Annie as a smaller version of their mother, and she feels a fierce protective love that coexists with violence. The mirror here is inverted: Callie sees in Annie the vulnerability she herself lacks, and she tries to harden Annie against the world. But this protection becomes a trap. Callie's “discipline” includes threatening Annie with an X-ACTO knife, an act she justifies as necessary. The bond is a trap because Callie cannot see that her love is destructive; she believes she is saving Annie from a cruel world, but she is perpetuating the cruelty.
The trap deepens when Annie begins to manipulate Callie. In chapter 37, Callie reveals that Annie framed her for stealing the diabetes medicine and for poisoning her, and that Callie took the blame to protect her sister. This is the ultimate sacrifice: Callie accepts punishment and exile to Sundial rather than expose Annie's true nature. The mirror here is tragic: Callie sees herself as the protector, but she is also the victim. She cannot break free because her identity is bound to Annie's well-being. As she says, “You're supposed to protect your little sister. That was one of the first things I ever learned.” The trap is that this duty is absolute, even when the sister is dangerous.
The climax of the novel hinges on this trap. When Callie finally tells Rob the truth—that Annie did not take the medicine and is now with Mrs. Goodwin—she is not freeing herself; she is re-entering the trap. She knows she will have to protect Annie for the rest of her life. The final drive to save Annie is an act of love, but it is also a surrender to the bond that has defined her. The mirror shows Callie that she is like her mother, willing to do anything to save her child, but the trap is that this devotion cannot be escaped.
The Cycle Repeats: From Sundial to the Desert
The theme is not confined to one generation; it repeats across the novel's structure. Rob's decision to take Callie to Sundial in the present mirrors her own childhood there. She hopes to separate Callie from Annie, believing that distance will break the toxic bond. But the desert setting—Sundial itself—is a place where the past is always present. The sundial, a symbol of time and fate, suggests that the cycle cannot be broken. Rob's own history with Jack is a warning, yet she repeats it with her daughters. The trap is generational: the sisters are bound to repeat the patterns of their mothers and aunts.
The final chapters show the cycle reaching its peak. Rob kills Irving to protect Callie, and Callie reveals the truth about Annie. The two women drive through the night, not to escape but to rescue Annie. The bond is a trap because it forces them into a future they cannot control. Callie's reflection that she will have to protect Annie forever is a sentence, not a choice. The mirror here is the recognition that they are all part of the same story: Rob and Jack, Callie and Annie, all trapped in a web of love and violence.
Symbols of the Bond: Sundial, Bones, Maggots, and the Click
Ward uses recurring symbols to deepen the theme. The sundial itself represents the inescapable passage of time and the repetition of fate. It is a clock that “tells out lives and time and days,” as Callie notes, and it is dangerous because it understands life and death. The sundial is a mirror of the sisters' bond: it reflects the past onto the present, showing that the same patterns will recur.
Animal bones are central to Callie's character. She collects the bones of dead animals, preserving them as a way to keep the dead close. This is a mirror of her relationship with Annie: she tries to preserve her sister's innocence, but the bones are also a trap, binding her to death and decay. The bones represent the way the sisters hold onto each other, even when that holding becomes destructive.
Maggots appear in the novel as a symbol of decay and transformation. Irving warms fishing maggots, and they are associated with the corruption that lurks beneath the surface. In the context of sibling bonds, maggots suggest that the love between sisters can rot from within, turning into something monstrous. The trap is that the decay is invisible until it is too late.
The click is the most direct symbol of control. It is the experimental conditioning that Rob and Jack underwent as children, and it represents the external forces that shape their behavior. The click is a trap because it dictates their actions, making them unable to escape their programming. For Rob and Jack, the click is a literal trap; for Callie and Annie, it is the inherited pattern of violence and protection that they cannot break.
Complexity and Contradiction
The theme is not simple. The sibling bond is both loving and destructive, and Ward refuses to let the reader choose one interpretation. Rob loves Jack, but she also resents her. Callie loves Annie, but she also hurts her. The mirror is not always accurate: Rob sees herself as good, but she is capable of violence; Callie sees herself as a protector, but she is also a victim. The trap is that the bond cannot be escaped without losing a part of oneself.
The novel also complicates the idea of protection. Callie's protection of Annie is both heroic and misguided. She takes the blame for Annie's crimes, but this only enables Annie's behavior. Similarly, Rob's decision to take Callie to Sundial is an attempt to protect Annie, but it isolates Callie and puts her in danger. The bond is a trap because the very act of protection can become a form of imprisonment.
Finally, the theme extends beyond sisters to mothers and daughters. Rob's relationship with Callie mirrors her relationship with Jack, and Callie's relationship with Annie mirrors Rob's with Jack. The trap is generational, and the mirror shows that the past is always present. Ward suggests that these bonds are inescapable, but she also shows moments of tenderness—the apple shared between Rob and Jack, the embrace between Callie and Jack in the tower—that complicate the darkness.
Study Questions and Answers
1. How does the sundial function as a symbol of the sibling bond?
The sundial represents time and fate, showing that the patterns of sibling relationships repeat across generations. It is a mirror that reflects the past onto the present, and a trap because it suggests that the cycle cannot be broken.
2. In what ways does Callie's collection of animal bones mirror her relationship with Annie?
Callie preserves the bones of dead animals to keep them close, just as she tries to preserve Annie's innocence. But the bones are also a trap, binding her to death and decay, just as her protective love for Annie becomes destructive.
3. How does the revelation about Rob's past violence complicate her identity as the “good one”?
Rob believes she is the good sister, but she learns that she attacked her adoptive mother with wire as a child. This shows that the mirror of sibling identity is false; she is capable of the same violence she condemns in Jack, making her bond with Jack a trap of self-deception.
4. Why does Callie take the blame for Annie's crimes, and what does this reveal about the trap of protection?
Callie takes the blame to protect Annie from punishment, believing that Annie cannot survive in a place for “bad kids.” This reveals that protection can become a trap, as it enables Annie's behavior and forces Callie to sacrifice her own freedom.
5. How does the novel suggest that the sibling bond is both a mirror and a trap?
The bond is a mirror because sisters see themselves and each other in ways that reveal their deepest fears and desires. It is a trap because this reflection binds them to cycles of violence and sacrifice that they cannot escape, as seen in the parallel stories of Rob and Jack and Callie and Annie.