Transcriber's Notes The original was printed with the Latin on verso and English on recto pages with sections aligned. To preserve as much as possible of this effect, Latin sections are followed immediately by the corresponding translation. Obvious typographical errors have been silently corrected. Variations in hyphenation spelling and punctuation remain unchanged. Italics are represented thus _italic_, except in the main Latin text which is almost entirely printed in italic script. Here the italics are unmarked and plain text is indicted thus =plain=. S. Augustinus (or Augustini) in the Latin text is translated as S. Austin in the English. * * * * * DEMONIALITY OR INCUBI AND SUCCUBI A TREATISE _wherein is shown that there are in existence on earth rational creatures besides man, endowed like him with a body and a soul, that are born and die like him, redeemed by our Lord Jesus-Christ, and capable of receiving salvation or damnation_, BY THE REV. FATHER SINISTRARI OF AMENO (17^{th} century) _Published from the original Latin manuscript discovered in London in the year 1872, and translated into French by_ ISIDORE LISEUX Now first translated into English With the Latin Text. [Illustration: Colophon] PARIS _Isidore LISEUX, 2, Rue Bonaparte._ 1879 [Illustration: Decoration] PREFACE TO THE FIRST EDITION (_Paris, 1875, in-8º_) I was in London in the year 1872, and I hunted after old books: _Car que faire là bas, à moins qu’on ne bouquine?_[1] They caused me to live in past ages, happy to escape from the present, and to exchange the petty passions of the day for the peaceable intimacy of Aldus, Dolet or Estienne. [1] What can one do over there, unless he hunts up old books? One of my favourite booksellers was Mr Allen, a venerable old gentleman, whose place of business was in the Euston road, close to the gate of Regent’s park. Not that his shop was particularly rich in dusty old books; quite the reverse: it was small, and yet never filled. Scarcely four or five hundred volumes at a time, carefully dusted, bright, arrayed with symmetry on shelves within reach of one’s hand; the upper shelves remained unoccupied. On the right, Theology; on the left, the Greek and Latin Classics in a majority, with some French and Italian books; for such were Mr Allen’s specialties; it seemed as if he absolutely ignored Shakespeare and Byron, and as if, in his mind, the literature of his country did not go beyond the sermons of Blair or Macculloch.