Usually, however, experiments like this fail, the entranced clairvoyant being able to discriminate between the thoughts which correspond to reality and those which are wholly imaginary. But that the process involved in clairvoyance is unquestionably telepathic has been otherwise proved by the fact that when conditions are imposed on clairvoyants absolutely excluding the possibility of thought transference from one mind to another, they are conspicuously unsuccessful in their efforts to obtain results. If, as often happens, they are able to describe distant places which they have never seen but with which other persons are necessarily familiar, they are nevertheless unable to state, for example, the number on a bank note, chosen at random from among others and placed in their hands in a sealed box without anybody previously ascertaining just what the number is. Such a test, if successful, would be decisive proof of independent clairvoyance; but I have yet to learn of any clairvoyant who has been able to meet it, although the effort has been frequently made. It should be pointed out that, in order to give it evidential value, there must not be the slightest possibility of any one even glancing at the bank note before it is put into the sealed box; for, as has already been said, it is now known that the eye is far keener than we usually realize, and that the merest glance may often put us in possession of facts which, sinking into the memory, may afterward emerge to astonish and perhaps mystify us. Once they were lodged in the mind, a clairvoyant could, of course, obtain these facts from us telepathically, and thus achieve a seeming success even in the bank note or some similar test. Indeed, this power of subconscious perception is of itself sufficient to explain many undoubtedly genuine instances of clairvoyance. There is obviously no need to go beyond it to account for such a clairvoyant dream as the following, reported by a lady who has declined to allow her name to be published: "A number of years ago I was invited to visit a friend who lived at a large and beautiful country seat on the Hudson. Shortly after my arrival I started, with a number of other guests, to make a tour of the very extensive grounds. We walked for an hour or more, and thoroughly explored the place. Upon my return to the house, I discovered that I had lost a gold cuff-stud, which I valued for association's sake. I merely remembered that I wore it when we started out, and did not think of or notice it again until my return, when it was missing. As it was quite dark, it seemed useless to search for it, especially as it was the season of autumn and the ground was covered with dead leaves.