Fig 90 and 91 in the Phenomena of Materialisation by Baron Von Schrenck-Notzing

Above are two materialisation photographs. One of  Alexandre Bisson - the husband of Mme. Bisson - and the Spirit form that called herself  Berthe.
 

This experimental sitting with Eva C was held on 1st June 1912 with Mme. Bisson and Prof. Schrenck-Notzing present.

Commencement, 8.45 p.m. end 10.30 p.m.

On this day Mme. Bisson hypnotised the Medium at 5 p.m.
Prof. Schrenck-Notzing gave a very interesting account of this experiment in his book Phenomena of Materialisations. A section of it reads (pg.165) - "In spite of the three flash-light exposures, the phenomena continued. The structure now appeared on the left shoulder. Eva illuminated it first with the red and then with the white electric torch, but the image, in which I distinctly perceived a male bearded face, with a high forehead, would not suffer the light, and disappeared behind the back of Eva's chair towards the back of the cabinet, without Eva having changed the position of her hands. Since I had closely followed the image from the shoulder, I did not let it go out of sight, but rose and put my head deep into the cabinet, bending over Eva as she sat quietly, and keeping the curtain closed under my chin. In this way a ray of light passed over my head, through the top of the curtain, on to the back of the cabinet, without disturbing the medium. The male face then stood facing me like a male portrait in life-size, fixed on the back wall, remained for about six seconds, and then revolved about its own axis flat on the wall, the upper part of the face falling down, and finally disappeared towards the floor behind the medium's back. During this whole observation Eva's body was motionless, and under my observation. The image was entirely separated from her. Its motion and disappearance appeared to be under the control of an unseen power".

Photograph by By Frederick A. Hudson
In the portrait are the Reverend William Stainton Moses (also known as M.A.Oxon) also Mr and Mrs Parkes with the photographed Spirit which was later recognised as the mother. 1873

Frederick Hudson is claimed to be the first Spirit photographer in England. Hudson started in March 1872, then went on to produce a regular amount of Spirit images with his human subjects individual and personal photographic plates up until about 1879.

The Reverend William Stainton Moses did hundreds of experiments with Hudson to try and get at the truth. In later years he published many articles after he was convinced that Hudson was genuine. when under test conditions Hudson continued to have the Spirit World place the deceased people onto the photographic plates with their relatives or friends they could recognize.