In The River of Night's Dreaming, one of the characters, a maid to Mrs Castaigne, is called Camilla, just as another character is called Cassilda. These characters, whilst distinct from their counterparts in the play, do seem to echo those that are in the play. Might their actions hint at those unexplored in the terrible Second Act of the play?
Camilla, at one point, appears in vampiric guise, possibly implying a link to Carmilla.