It was indeed he. The real name of the Father of Ameno was _Sinistrari_, and I was in possession of the title of one at least of those “serious works” which Brunet the bibliographer alluded to. The very title, _De Delictis et Pœnis_, was not unconnected with that of my manuscript, and I had reason to presume that _Demoniality_ was one of the offenses inquired into, and decided upon, by Father Sinistrari; in other words, that manuscript, to all appearances inedited, was perhaps published in the extensive work revealed to me; perhaps even was it to that monography of _Demoniality_ that the _Tractatus de Delictis et Pœnis_ owed its condemnation by the Congregation of the _Index_. All those points required looking into. But it is necessary to have attempted investigations of that kind in order to appreciate the difficulties thereof. I consulted the catalogues of ancient books that came in my way; I searched the back-shops of the dealers in old books, the _antiquaries_, as they say in Germany, addressing especially to the two or three firms who in Paris apply themselves to old Theology; I wrote to the principal booksellers in London, Milan, Florence, Rome, Naples: all to no purpose; the very name of Father Sinistrari of Ameno seemed to be unknown. I should perhaps have begun by enquiring at our National Library; I was obliged to resort to it, and there at least I obtained an incipient gratification. I was shown two works by my author: a quarto of 1704, _De incorrigibilium expulsione ab Ordinibus Regularibus_, and the first tome of a set of his complete works: _R. P. Ludovici Mariæ Sinistrari de Ameno Opera omnia_ (_Romæ, in domo Caroli Giannini, 1753-1754_, 3 vol. in-folio). Unfortunately that first tome contained but the _Practica Criminalis Minorum illustrata_; _De Delictis et Pœnis_ was the subject matter of the third tome, which, as well as the second, was missing at the Library.