Period:

An 1870s spirit photograph by Fredrick A. Hudson featuring an unidentified man in a trance and a spirit in a cloth. The photograph bears the inscription "Copyright F. Hudson" on the front and "No. 22" on the rear.

A 1912 spirit photograph by William M. Keeler featuring the spirit of Napoleon Bonaparte. Napoleon Bonaparte (1769-1821) - French military and political leader who became Emperor of France from 1804 to 1814. He is renowned for his military prowess but his ambition ultimately led to his defeat and exile to Elba before his final defeat at the Battle of Waterloo.

A 1900s spirit photograph by William M. Keeler featuring Arthur H. C. and the spirit of Princess Sophia. The back of the photograph bears the inscription: Arthur H. C. Photo by Keeler _____ by A.R.C. Sophia - Electress of Hanover Daughter of James I of Eng + VI of Scotland Sophia of Hanover (1630-1714) - German princess who was next in line for the English and Irish thrones after King William III, due to her Protestant faith. Her son, George I, later became the first British monarch from the House of Hanover. Sophia was also a patron of the arts and had intellectual interests.

A 1909 spirit photograph by William M. Keeler featuring an unidentified man and a spirit. The back of the photograph bears the inscription “Sept 25/09”.

An 1872 spirit photograph by Frederick A. Hudson featuring a girl and the spirit of her mother. The back of the photograph bears the inscription "May 2nd, 1872 / Mrs. Guppy's cousin and Miss Houghton mediums / A young child was standing where this spirit, her deceased mother, appeared. The mother was well known to me during her childhood and girlhood. G. Houghton". Georgiana Houghton (1814–1884) – British artist and Spiritualist medium.

An article titled “How to Make Spirit Photographs” from the August 25th, 1916 edition of South Side Signal. This article explains how to make spirit photographs by printing from regular negatives onto printing-out paper, fixing the prints in a hyposulphite of soda solution, and then immersing them in a bichloride of mercury solution. To reveal the spirit photograph, moisten a piece of blotting paper and hold it in contact with the print.

An 1893 spirit photograph by James A. Bostwick featuring an unidentified woman and a spirit. The back of the photograph bears the inscription "Bostwick / 98 Sixth Ave / New York".

A 1910s spirit photograph by William M. Keeler featuring an unidentified man and a spirit. The back of the photograph bears the inscription "Spirit of good ghost / Keeler medium".

An 1880s spirit photograph by an unknown photographer featuring an unidentified man and two spirits.

An 1863 spirit photograph by William H. Mumler featuring Luther Parks and the spirit of a child. The back of the photograph states the spirit is his nephew but that appears to be a misprint in reference to another spirit photograph Parks had taken. The back of the photograph bears the inscription: PORTRAIT OF MR LUTHER PARKS, of Boston, U.S.A. The figure is recognized by himself and his family, as that of a deceased Nephew. See "Spiritual Magazine" for January & Feb. 1863. The Spiritual Magazine describes the photos as follows: The next is a portrait of Mr. Luther Parks, an elderly gentleman, well known in this city, sitting with his hat on. The spirit in this picture is entirely…