The essays contained in this book, although apparently disconnected, were written at one time and with one object - to collect and digest the facts relating to a number of incidents which have not, at present, been satisfactorily explained. In order to present these facts as clearly as possible, the author has quoted rather extensively from the original sources, as most of these are not very accessible. The method pursued in the presentation of these oddities has been to present the facts, wherever possible, in the form of quotations from the original sources, and to supply enough references to enable any one who will, to go into them more deeply. In revising the book for this re-issue, the author has done his best to incorporate - either as text, footnote, or postscript - the bulk of the information which, in consequence of much correspondence and a certain amount of research, has come his way since the book was first published in 1929. Illustrated with Plates and Figures.