Unlawful Occasions / Weekend with Death

She held the candle steady and, stooping, touched the smeared patch with the tip of her finger. The stain was blood.
When Sarah Marlowe, secretary to the president of the New Psychical Society, touches the cold, strange object in her hand-bag, she thinks at first it is a snake. As things turn out, it is almost as dangerous.
Her travelling acquaintance, Emily Case, has been murdered by someone who won’t hesitate to kill again to obtain the contents of Sarah’s bag. Unwilling to join the spirit world herself, Sarah enlists the aid of a handsome if not entirely trustworthy stranger, John Wickham. Together they must scrabble to solve the mystery—and outwit a murderer.