"Some of the best workers in the Society," says Mr. Wallace again, "still urge that the evidence is very deficient, both in amount and in quality, and that much more must be obtained before it can be treated as really conclusive. This view, however," he adds, "appears to me to be an altogether erroneous one." On the contrary, I venture to say, this assertion of the need of more work, and consequently of more workers, is of absolutely primary, absolutely urgent importance. What would have become of the evolution theory itself (if I may use an _argumentum ad hominem_ of no disrespectful kind), what would have become of that theory itself, though urged at first by _savants_ of such surpassing merit, had no one been able to repeat and confirm their observations? And we who are dealing, not with plants and animals which can be held fast and observed, but, for the most part at any rate, with phantasmal sights, subjective impressions,--surely we must feel a tenfold need of the multiplication of centres of experiment and observation, of the formation of fresh bodies of record in every country, and in each year that passes by. No single small group can ever gain leverage enough to divert the world's prevalent modes of thought, unless it is gradually reinforced by fellow-workers enough to make the possible mistakes or possible death of a few persons quite unimportant to the general result. It has been suggested by Mr. Wallace and by other critics that we have been too exclusively preoccupied with the idea of _telepathy_, that we have tried to force into that category phenomena which need a different or a further explanation. Considering the complexity of these phenomena there may well be some truth in this criticism, yet we should surely be unwise if we relaxed our insistence on the importance of _telepathy_, or the transference of thought or feeling from mind to mind without the agency of the recognized organs of sense as the very root and basis both of experiment and of theory as concerning an unseen world. No one, of course, can suppose that the infinitely complex laws of which we are just now obtaining a precursory glimpse and first faint intimation, can possibly be summarized in any single expression. But the prime importance of telepathy lies in the fact that here, at last, is an action of unseen, uncomprehended forces which can be made the subject of actual experiment. Nay, more, the very fact that in this special direction experiment turns out to be possible, is in itself an augury that we are on a true scientific track; for it involves a remarkable coincidence between a theoretical conclusion and a practical discovery.