Men have claimed--and proved to the satisfaction of more or less considerable numbers of friends--that they could at will cause a partial and momentary parting between their souls and their bodies. Here also antiquity is our first teacher, if we believe Pliny (_Hist. Nat._ vii. c. 52), Hermotimus could at his pleasure fall into a trance and then let his soul proceed from his body to distant places. Upon being aroused, he reported what he had seen and heard abroad, and his statements were, in every case, fully confirmed. Cardanus, also, could voluntarily throw himself into a state of apparent syncope, as he tells us in most graphic words (_De Res. Var._ v. iii. l. viii. c. 43). The first sensation of which he was always fully conscious, was a peculiar pain in the head, which gradually extended downward along the spine, and at last spread over the extremities--evidently a purely nervous process. Then he felt as if a "door was opened, and he himself was leaving his body," whereupon he not only saw persons at a distance, but noticed all that befell them, and recalled it after he had recovered from the trance. An old German Abbé Freitheim, of whose remarkable work on _Steganographie_ (1621), unfortunately only a few sheets have been preserved, claims the power to commune with absent friends by the mere energy of his will. "I can," says he, "make known my thoughts to the initiated, at a distance of many hundred miles, without word, writing or cypher, by any messenger. The latter cannot betray me, for he knows nothing. If needs be, I can even dispense with the messenger. If my correspondent should be buried in the deepest dungeon I could still convey to him my thoughts as clearly, as fully, and as frequently as might be desirable, and all this, quite simply, without superstition, without the aid of spirits."