Spiritualism
Spiritualism is the belief that man can interact with spirits of the dead in order to learn information and improve himself (some Spiritualists¸ especially Christian Spiritualists¸ extend this interaction to include supernatural beings such as angels)¸ which spread in popularity during the Imperial Age.
"Practitioners of Spiritualism are generally known as Mediums. As the name implies¸ a Medium is the conduit through which spirits and other outsiders can interact with the physical world. While this title conjures images of séances in darkened rooms¸ mediums were considered capable of healing as well as divination.
"The Imperial Age: Spiritualism is your guide to the belief which spread like wildfire throughout the western world in the latter half of the 19th century¸ as many people cast aside their old beliefs in favour of what they learned through direct contact with the afterlife. Contained within this 17-page supplement: an overview of Spiritualism¸ including the major groups which proliferated during the Imperial Age; a guide to using Spiritualism in five different campaign styles¸ including Adventure Hooks; an advanced class which allows you to add Mediums to your Victorian-era campaign; and new incantations and feats.