th in the
ever-recurring allegation that figures, other than those visually
present in the room, appeared on the sensitive plate.... Mr. D., of
Glasgow, in whose presence psychic photographs have long been
alleged to be obtained, was lately in London on a visit, and a
mutual friend got him to consent to extend his stay in order that I
might try to get a psychic photograph under test conditions. To
this he willingly agreed. My conditions were exceedingly simple,
were courteously expressed to the host, and entirely acquiesced in.
They were that I, for the nonce, would assume them all to be
tricksters, and, to guard against fraud, should use my own camera
and unopened packages of dry plates purchased from dealers of
repute, and that I should be excused from allowing a plate to go
out of my own hand till after development, unless I felt otherwise
disposed; but that as I was to treat them as under suspicion, so
must they treat me, and that every act I performed must be in the
presence of two witnesses; nay, that I would set a watch upon my
own camera in the guise of a duplicate one of the same focus--in
other words, I would use a binocular stereoscopic camera and
dictate all the conditions of operation....

"'Dr. G. was the first sitter, and, for a reason known to myself, I
used a monocular camera. I myself took the plate out of a packet
just previously ripped up, under the surveillance of my two
detectives. I placed the slide in my pocket and exposed it by
magnesium ribbon which I held in my own hand, keeping one eye, as
it were, on the sitter, and the other on the camera. There was no
background. I myself took the plate from the dark slide, and, under
the eyes of the two detectives, placed it in the developing dish.
Between the camera and the sitter a female figure was developed,
rather in a more pronounced form than that of the sitter.... I
submit this picture.... I do not recognize her, or any of the other
figures I obtained, as like any one I know....

"'Many experiments of like nature followed; on some plates were
abnormal appearances, on others none. All this time Mr. D., the
medium, during the exposure of the plates, was quite inactive....

"'The psychic figures behaved badly. Some were in focus, others not
so. Some were lighted from the