I have not been to Mannheim, but I made my pilgrimage to Elberfeld and stayed long enough in the town to carry away with me the conviction shared by all those who have undertaken the journey. A few months ago, Herr Krall, whom I had promised the year before that I would come and see his wonderful horses, was kind enough to repeat his invitation in a more pressing fashion, adding that his stable would perhaps be broken up after the 15th of September and that, in any case, be would be obliged, by his doctor's orders, to interrupt for an indefinite period a course of training which he found exceedingly fatiguing. I at once left for Elberfeld, which, as everybody knows, is an important manufacturing-town in Rhenish Prussia and is, in fact, more quaint, pleasing and picturesque than one might expect. I had long since read everything that had been published on the question; and I was wholly persuaded of the genuineness of the incidents. Indeed it would be difficult to have any doubts after the repeated and unremitting supervision and verification to which the experiments are subjected, a supervision which is of the most rigorous type, often hostile and almost ill-mannered. As for their interpretation, I was convinced that telepathy, that is to say, the transmission of thought from one subconsciousness to another, remained, however strange it might be in this new region, the only acceptable theory; and this in spite of certain circumstances that seemed plainly to exclude it. In default of telepathy proper, I inclined toward the mediumistic or subliminal theory, which was very ably outlined by M. de Vesmes in a remarkable lecture delivered, on the 22nd of December, 1912, before the Societe Universelle d'Etudes Psychiques. It is true that telepathy, especially when carried to its extreme limits, appeals above all to the subliminal forces, so that the two theories overlap at more than one point and it is often difficult to make out where the first ends and the second begins. But this discussion will be more appropriate a little later. 6 I found Herr Krall in his goldsmith's shop, a sort of palace of Golconda, streaming and glittering with the most precious pearls and stones on earth. Herr Krall, it is well to remember, in order to dispel any suspicion of pecuniary interest, is a rich manufacturer whose family for three generations, from father to son, have conducted one of the most important jewelry businesses in Germany. His researches, so far from bringing him the least profit, cost him a great deal of money, take up all his leisure and some part of the time which he would otherwise devote to his business and, as usually happens, procure him from his fellow citizens and from not a few scientific men more annoyance, unfair criticism and sarcasm than consideration or gratitude. His work is preeminently the disinterested and thankless task of the apostle and pioneer.