This was a little curiosity, 18th century incomplete novel that takes the case of a Prince, who is witness to some Necromancy and Divination which he is at first at a loss to explain, then, when he is undeceived, goes down a rabbit hole that leads in the end to his being taken back to the faith by an enigmatic "Albanian".
More a little store of undeveloped ideas, not in any way great, merely curious, a peculiar half-developed tale sprung no doubt from indigestion, like a bad dream...
Link: Wiki on The Ghost-Seer