THIS work was originally constructed, and in previous editions appeared, in the form of Lectures. The only vestiges of that form, in its present shape, are certain modes of expression. The language retains the character of an address by a speaker to his hearers; being more familiar, direct, and personal than is ordinarily employed in the relations of an author to a reader. The former work was prepared under circumstances which prevented a thorough investigation of the subject. Leisure and freedom from professional duties have now enabled me to prosecute the researches necessary to do justice to it. The "Lectures on Witchcraft," published in 1831, have long been out of print. Although frequently importuned to prepare a new edition, I was unwilling to issue again what I had discovered to be an insufficient presentation of the subject. In the mean time, it constantly became more and more apparent, that much injury was resulting from the want of a complete and correct view of a transaction so often referred to, and universally misunderstood