Mirror Image

To look at one was to see the other. For family, even the girls' own father, it was a constant guessing game. For strangers, the surprise was overwhelming. And for the twins Olivia and Victoria Henderson, two remarkable young women coming of age at the turn of the century, their bond was mysterious, marvelous, and often playful—a secret realm only they inhabited.

Olivia and Victoria were the beloved daughters of a man who never fully recovered from his wife's death bearing them in 1893. Shy,...