274. All spirits, to whatever degree of the scale they belong, may be invoked — the good, as well as the bad ; those who have left this life but lately, and those who have lived in the most remote times ; illustrious men and the most obscure; our relatives, our friends, and. those who are indifferent to us; but it is not said that they will or can always come at our call: independently of their own will, or of the permission that may be refused them by a superior power, they might be prevented by motives which it is not always given us to penetrate. We would say, there is no absolute hindrance to communications except what we shall presently give ; the obstacles that might hinder the manifestation of a spirit are almost always individual, and pertain to circumstances.
