Phyllis, a twin

In Short

Separated in early childhood, golden-haired Phyllis Page and her soft-spoken twin Janet reunite in New York City to attend school together. While adapting to private school life, making fast friends, and sorting through teenage social rivalries, the sisters find themselves entangled in a local mystery. When a young boy is kidnapped, the twins put their heads together to unravel the clue in the window, reunite the family, and claim their shared future. Dorothy Whitehill's lighthearted tale captures the cozy charm, loyalty, and effortless fun of classic series fiction for adolescent girls.

The Story

In a sunlit house off Fifth Avenue, thirteen-year-old Phyllis Page eagerly prepares a rose-and-pink bedroom for her twin sister, Janet, whom she has not seen in years. Janet has been living in the quiet town of Old Chester, but comes to New York to reside with Phyllis and their Auntie Mogs. Though the sisters share an unmistakable resemblance, their personalities differ: Phyllis is impulsive, imaginative, and light on her feet, while Janet is reserved and given to quiet brooding until she relaxes into her new home.

The twins enter Miss Harding’s private school together, joining a lively circle of schoolmates. Sally Ladd, the buoyant and humorous leader of their group, quickly claims the twins as close chums, along with the sophisticated Daphne Hillis and the dignified Muriel Grey. Social dynamics shift as Muriel begins acting noticeably mature owing to the attentions of a boy named Chuck, leaving Phyllis to lean more heavily on Sally’s easy friendship.

As autumn deepens, social gatherings and seasonal events fill their schedules. At a neighborhood masquerade party, the girls wear identical domino cloaks to confound their classmates, leading to comedic mix-ups when Chuck mistakes Phyllis for Janet. Outside of school, Phyllis becomes obsessed with a window in the house behind their yard, where a caretaker has carefully fitted a dark wire screen.

The story takes a dramatic turn when little Donald Keith, the four-year-old relative of Chuck who befriended Phyllis in the park, is kidnapped. The neighborhood is cast into distress, and Muriel grieves openly at school. Days later, while Janet is recovering from a mild illness upstairs, Phyllis looks out the window toward the screened house across the yard. Spotting a tiny white mitten dropped onto the roof below the wire-screened window, Phyllis connects the clue to the suspicious caretaker she saw entering a local shop.

Using field glasses, the twins confirm their suspicions, leading to Donald's rescue from his captors. Overjoyed, Mr. Keith and Donald’s family shower the girls with gratitude. With the mystery resolved, the twins enjoy a cozy Christmas vacation back in Old Chester, exploring "The Enchanted Kingdom"—a local property restored by their old friend Peter—before returning to New York to finish their school term. As the year draws to a close, their older brother Tom writes from out West, inviting Phyllis, Janet, and Auntie Mogs to visit his ranch, sealing their new life of shared adventures.

How It Unfolds

The twin arrives Phyllis readies the house for her long-separated sister, eager to start a new chapter together. Janet arrives from Old Chester and is swept into the warm, sunlit routines of her city family.

School and dynamic shifts The sisters enter Miss Harding's study hall, where schoolmate rivalries and changing friendships test the girls. Sally Ladd welcomes Janet into their circle, while Muriel Grey drifts toward growing up too fast.

A night of disguises At a grand costume party, the twins and their friends wear matching dominoes to fool their classmates. Chuck tries to figure out which twin is which, leading to lighthearted confusion on the dance floor.

A shadow in the yard Phyllis notices strange activity in the screened window of the house behind their yard. A dark shadow moves behind the shade, sparking her imagination and curiosity.

The white mitten When little Donald Keith is reported kidnapped, Phyllis spots a tiny baby mitten lying on the roof beneath the screened window. Combining this clue with previous sightings, the twins realize where the boy is hidden and help bring about his rescue.

Holidays and new horizons After the excitement calms down, the family spends Christmas vacation visiting Old Chester, where they reconnect with old friends and tour the revamped "Enchanted Kingdom." Months later, a letter from brother Tom invites the twins out West for their next big journey.

The People

• Phyllis Page wants fun, warmth, and constant activity. Impulsive and energetic, she acts as the spark in her group of friends, though her quick nature means she sometimes changes her mind in an instant. She grows into a observant, brave girl who uses her sharp eyes to solve a neighborhood crime.
• Janet Page wants to fit in without causing a fuss. Shy and prone to quiet sulking at first, she worries about being a burden or acting foolishly like the characters in her old storybooks. Through the affection of her sister and Sally, she gains confidence and learns to embrace her new life.
• Sally Ladd wants humor, good toast, and lively company. Loud, cheerful, and prone to dramatic outbursts ("Aunt Jane's poll parrot!"), she anchors the girls' circle and keeps everyone laughing through social blunders.
• Donald "Don" Keith wants to chase brownies in the park and stay near Phyllis. A sweet, chatterbox toddler who insists on using "were" instead of "was," his sudden abduction drives the book's central mystery.
• Chuck wants to prove his maturity and navigate the confusing world of teenage parties. Friendly but easily baffled by the twins' tricks, he acts as a bridge between the girls and the older boys.
• Miss Carter ("Auntie Mogs") wants a happy, harmonious home for her nieces. Patient, generous, and deeply involved in local settlement work, she provides a steady guiding hand.

In Its Own Voice

"In a house just off Fifth Avenue, a short distance from Central Park, all the windows were open to admit the dazzling sunshine."

The story opens on a crisp autumn afternoon in New York, setting a bright, inviting mood for the girls' reunion.

"'It's easy,' Chuck laughed, holding out his hand to Phyllis. 'You are Don's girl.'"

At the masquerade, Chuck tries to untangle the identity of the identical twins, using small personal details to tell them apart.

"Phyllis faced her squarely, her breath was coming in short little gasps. For a second Janet did not understand, then the bond of understanding that so closely bound them, as twins, together made her see what was going on in Phyllis's mind."

Spotting the white mitten on the roof below, the sisters instantly share a moment of realization that leads directly to little Don's rescue.

What It's Really About

Beneath its cozy domestic routines and juvenile detective plot, the book explores the quiet work of building an identity alongside a duplicate self. Having lived apart for years, Phyllis and Janet must navigate what it means to be individuals while sharing a face, a family, and a classroom. The story touches on the delicate shifts in adolescent female friendships, contrasted through Muriel's abrupt desire to act adult and Sally's stubborn childhood playfulness. Whitehill suggests that growing up does not require abandoning enthusiasm or loyalty; rather, true maturity shows in keen observation, empathy, and standing by the people you love when real danger touches their world.

Why Read It Today

Phyllis, a Twin offers modern readers a delightful slice of early twentieth-century series fiction, filled with sunny optimism, light mystery, and the charming slang of 1920s youth culture. The prose carries a gentle warmth, making the world of tea parties, snow days, and study halls feel like a comforting escape. Readers who appreciate classic girls' school stories—such as those by Maud Hart Lovelace or L.M. Montgomery—will enjoy the easy camaraderie between the twins and their bright-eyed friend Sally Ladd.

While the plot moves at a comfortable, episodic pace, the story does reflect its era. The dialogue features period slang ("bully," "poll parrot"), and the plot relies on straightforward, wholesome resolutions where adults are endlessly benevolent and problems are solved over hot chocolate. The narrative avoids heavy angst, choosing instead to focus on loyalty, observational cleverness, and simple kindness. It leaves the reader with a refreshing sense of innocence and the cozy satisfaction of a mystery neatly solved by two sisters who have found their way back to one another.