Galton, Joule, Lockyer, and Edison, have been or are all working in common with theosophists, spiritualists, Folk-lorists, and many more, not diversely but all towards a grand solution of the Unknown. Therefore there is nothing whatever in the past relating to the influences which have swayed man, however strange, eccentric, superstitious, or even repulsive they may seem, which is not of great and constantly increasing value. And if we of the present time begin already to see this, how much more important will these facts be to the men of the future, who, by virtue of more widely extended knowledge and comparison, will be better able than we are to draw wise conclusions undreamed of now. But the chief conclusion for us is to collect as much as we can, while it is yet extant, of all the strange lore of the olden time, instead of wasting time in forming idle theories about it. In a paper read before the Congrès des Traditions populaires in Paris, 1889, on the relations of gypsies to Folk-lore, I set forth my belief that these people have always been the humble priests of what is really the practical religion of all peasants and poor people; that is their magical ceremonies and medicine. Very few have any conception of the degree to which gypsies have been the colporteurs of what in Italy is called "the old faith," or witchcraft. As regards the illustrative matter given, I am much indebted to Dr. Wlislocki, who has probably had far more intimate personal experience of gypsies than any other learned man who ever lived, through our mutual friend, Dr. Anthon Herrmann, editor of the Ethnologische Mitteilungen, Budapest, who is also himself an accomplished Romany scholar and collector, and who has kindly taken a warm interest in this book, and greatly aided it. To these I may add Dr. Friedrich S. Krauss, of Vienna, whose various works on the superstitions and Folk-lore of the South Slavonians--kindly presented by him to me--contain a vast mine of material, nearly all that of which he treats being common property between peasants and the Romany, as other sources abundantly indicate. With this there is also much which I collected personally among gypsies and fortune-tellers, and similar characters, it being true as regards this work and its main object, that there is much cognate or allied information which is quite as valuable as gypsy-lore itself, as all such subjects mutually explain one of the others.