The Golden Key — Marian Womack

“Spiritualism, the suffragette movement, and the fairy tales of Lewis Carroll” combine in this eerie Gothic mystery that will “captivate fans of historical fiction” (Booklist).
 
Helena Walton-Cisneros is called to solve a decades-old cold case in the Fens of Norfolk -- an age-old ‘fairyland' of folklore, dark magic, and missing children . . .

1901. After the death of Queen Victoria, England heaves with the uncanny. Séances are held and the dead are called upon from darker realms.

Helena Walton-Cisneros, known for her ability to find the lost and the displaced, is hired by the elusive Lady Matthews to solve a twenty-year-old mystery: the disappearance of her three stepdaughters who vanished without a trace on the Norfolk Fens.

But the Fens are an age-old land, where folk tales and dark magic still linger. The locals speak of devilmen and catatonic children are found on the Broads. Here, Helena finds what she was sent for, as the Fenland always gives up its secrets, in the end.