come through the streets, and she almost invariably came when he willed
it. We have, too, a number of most interesting experiments in which
_dreams_ have been induced in others--by trying to influence the
sleeping thoughts of the dreamer. Here is a fruitful field, as yet
hardly touched, for an experimenter in this line of research.[40]

Among the most interesting and dramatic cases of the kind are those
experiments in which one person has voluntarily caused a figure of
himself to appear to another at a distance. Thus, A sits down and wills
intently that he shall appear to B that night--in sleep or waking, as
the case may be. The next morning A receives a letter from B, stating
that he has seen an apparition of him, and asking him if he is well. The
following is an example of a case of this character:

"One certain Sunday evening in November, 1881, having been reading
of the great power which the human will is capable of exercising, I
determined with the whole force of my being that I would be present
in spirit in the front bedroom of the second floor of a house
situated at 22 Hogarth Road, Kensington, in which room slept two
young ladies of my acquaintance, viz. Miss L. S. V. and Miss E. C.
V., aged respectively twenty-five and eleven years. I was living at
this time at 23 Kildare Gardens, at a distance of about three miles
from Hogarth Road, and I had not in any way mentioned my intention
of trying this experiment to either of the above ladies, for the
simple reason that it was only on retiring to rest upon this
particular Sunday night that I made up my mind to do so. The time
at which I determined to be there was one o'clock in the morning,
and I also had a strong intention of making my presence
perceptible.

"On the following Thursday I went to see the ladies in question,
and in the course of conversation (without any allusion to the
subject on my part) the elder one told me that on the previous
Sunday night she had been much terrified by perceiving me standing
by her bedside and that she screamed when the apparition advanced
toward her, and awoke her little sister who saw me also...."
(Corroborative evidence was obtained from the two ladies
mentioned.)

Such a case is called a "telepathically induced hallucination" or an
"experimental apparition," for the reason that the figure seen is
doubtless h