In 1898, Duckworth published Clemence Housman's second novel, The Unknown Sea. This story relates the love affair between a man named Christian and a cruel mermaid, Diadyomene. Many of the themes present in The Were-Wolf reoccur here; although the antagonist cannot transform like The Were-Wolf's White Fell she is a half-human, half-animal creature whose goal is to seduce and kill a man. Kisses are also associated with death in this text, with Diadyomene kissing Christian after she kills him. In addition, the protagonist shares his name with Christian in The Were-Wolf, and it is similarly used for religious allusions. Here, Christian's martyrdom is represented in his self-sacrifice to save Diadyomene's soul and redeem her (Housman, Unknown Sea; Sutherland, The Longman Companion).