We see in travelling clairvoyance,[117] just as we see in crystal-visions, a kind of fusion of all our forms of supernormal faculty. There is telepathy, telæsthesia, retrocognition, precognition; and in the cases reported by Cahagnet, which will be referred to in Chapter IX., there is apparently something more besides. We see, in short, that any empirical inlet into the metetherial world is apt to show us those powers, which we try to distinguish, coexisting in some synthesis by us incomprehensible. Here, therefore, just as with the crystal-visions, we have artificially to separate out the special class of phenomena with which we wish first to deal. In these experiments, then, there seems to be an independent power of visiting almost any desired place, its position having been perhaps first explained by reference to some landmark already known. The clairvoyante (I use the female word, but in several cases a man or boy has shown this power) will frequently miss her way, and describe houses or scenes adjacent to those desired. Then if she--almost literally--gets on the scent,--if she finds some place which the man whom she is sent to seek has some time traversed,--she follows up his track with greater ease, apparently recognising past events in his life as well as present circumstances. In these prolonged experimental cases there is thus time enough to allow of the clairvoyante's traversing certain places, such as empty rooms, factories, and the like, whither no assignable link from any living person could draw her. The evidence to prove telæsthesia, unmixed with telepathy, has thus generally come _incidentally_ in the course of some experiment mainly telepathic in character. These long clairvoyant wanderings are more nearly paralleled by _dreams_ than by waking hallucinations. In a case which I will here quote a physician is impressed, probably in dream, with a picture of a special place in a street, where something is happening, which, though in itself unemotional--merely that a man is standing and talking in the street--is of moment to the physician, who wants to get unobtrusively into the man's house. From _Phantasms of the Living_, vol. i. p. 267. The case is there described as coming "from a Fellow of the College of Physicians, who fears professional injury if he were 'supposed to defend opinions at variance with general scientific belief,' and does not therefore allow his name to appear." _May 20th, 1884._