Catherine Crowe (1790-1872) was a successful author of fiction, non-fiction and plays, who moved in literary circles and corresponded with the prominent authors of her day, including W. M. Thackeray and Harriet Martineau. Her interest in the supernatural and the spiritual dimension, and her frustration with the narrow-mindedness of her generation, are evident in this work, first published in 1859. A strong believer in the possibilities of spiritual planes and of forces beyond contemporary human knowledge, she suggests that much is still unknown to the human race, and that the advance of scientific materialism may hinder the search for spiritual insight. Unusually for her time, Crowe also questions the literal truth of the Bible, suggesting metaphorical interpretations of scripture, and asks how modern miracles or prophets might be recognised, in a society so closed to the possibility of the physically impossible.