The Mediums' Book (Unabridged‪)‬

The Mediums’ Book is not addressed to materialists, who must be brought from materialism to spiritualism, if at all, by their personal ascertainment of the reality of the modern spiritist "manifestations" and by the proof they give of the continued existence of the souls of the deceased men and women by whom they are produced. 

It is addressed exclusively to those who already believe that there is, in man, a principle of conscious individuality which survives the body, and who consequently admit, first, the action of law in the evolution of human life, and, second, the existence of the Inscrutable Ordainer of the universe, of whose wisdom and will that law is the expression. 

Anna Blackwell