account of practical limitations of space, if for no other reason, I have felt obliged entirely to pass over no small number of points concerning which I was minded to write something fully, as also was it necessary for me to treat with economy other details not unworthy of closer investigation.
To the most learned Prefect of the Ambrosian Library, Monsignor Professore Giovanni Galbiati, I am greatly indebted for the trouble and pains he has so generously bestowed on my behalf in making very particular researches concerning Francesco-Maria Guazzo and in communicating to me important bibliographical and historical details of the Ambrosiani.
My best thanks are due to Dr. H. T. Norman, not only for the loan of many rare pieces on witchcraft from among the treasures of his library, but also for the very real and inspiring interest he has so cordially taken in the present series.
Montague Summers.
