The reader who has persisted so far in the present volume will doubtless recall the fact that the first portion is heralded by a short foreword from one Edward Cayley, who therein expresses his full belief in the narrative he publishes. In this preface also he makes allusion to the traveller Sir W---- Y----, the original finder and owner of the manuscript. For the sake of convenience and explanation therefore I shall state here that the Editor of Part I. is the late Mr Edward Cayley, F.S.A., an official employed in the British Museum, whose book was issued in the early months of 1913. How this obscure work came into my possession I shall explain in due course, but I should like to add here that the book in question evoked no public interest whatsoever, and that such scanty notices of it as appeared were invariably unfavourable or contemptuous. Such a fate seems natural enough to me, for I have long observed how in all publications concerning the occult, nine out of ten readers are to be found scoffers and unbelievers, whilst the tenth is over-credulous. But a few weeks after the appearance of the volume, its editor himself was far beyond the range of hostile jest or criticism, for one March evening he was found dead of heart disease in the railway carriage wherein he was returning to his home at Harrow. Of "the exquisitely prepared roll of vellum covered with close crabbed writing," as also of its containing cylinder of some exotic white metal, I have been assured by Mr Cayley's executor that of neither can a trace be found--"suddenly, as rare things will, they vanished," though I am inclined to think that these gentlemen in common with a good many others of Mr Cayley's friends have never credited their existence save in the brain of their late owner. Indeed, I am told not a few persons openly denounced the ill-fated volume as an indiscreet _jeu d'esprit_ of which Cayley himself was both author and editor. As to Sir W---- Y---- I see no reason to withhold the full name of Sir Wardour Yockney, head of an ancient Kentish house which received its baronetcy so long ago as the reign of Charles the Martyr. Sir Wardour was a fine shot, an ardent mountaineer and no mean scholar--alas! that I must use the aorist here in so speaking of him, for Sir Wardour, who started for Flanders with a motor car soon after the outbreak of the War, was described as "missing" so long ago as last October, nor have any further tidings reached his household concerning his fate.