With the web site Marie provided for us:
I was able to find out that the photographer's name was Félix Nadar which was the pseudonym of Gaspard-Félix Tournachon (1 April 1820, Paris – 23 March 1910), a French photographer, caricaturist, journalist, novelist and balloonist. Some photographs by Nadar are marked "P. Nadar" for "Photographie Nadar"
Nadar was born in April 1820 in Paris (though some sources state Lyon). He was a caricaturist for Le Charivari in 1848. In 1849 he created the Revue comique and the Petit journal pour rire. He took his first photographs in 1853 and in 1858 became the first person to take aerial photographs. He also pioneered the use of artificial lighting in photography, working in the catacombs of Paris.
Marie said that she thought the young woman's name was Selika Lazevski. I doubt that is her name only because after going through literally a thousand photographs last night, I found that name attached to a couple of different female subjects.
More pictures of the same young lady:
It was obvious that Nadar preferred to work in a studio doing portrait type settings as there are only a few outdoor photos and hundreds of studio shots with back drops and props. I only found 2 photos with animals in them. Here are a few more of his equestrian subjects and some more details about his work:
Around 1863, Nadar built a huge (6000 m³) balloon named Le Géant ("The Giant"), thereby inspiring Jules Verne's Five Weeks in a Balloon. Although the "Géant" project was initially unsuccessful Nadar was still convinced that the future belonged to heavier-than-air machines. Later, "The Society for the Encouragement of Aerial Locomotion by Means of Heavier than Air Machines" was established, with Nadar as president and Verne as secretary. Nadar was also the inspiration for the character of Michael Ardan in Verne's From the Earth to the Moon.
Circa 1865: « Revolving » selfportrait by Nadar; 2010: AnimationOn his visit to Brussels with the Géant, on 26 September 1864, Nadar erected mobile barriers to keep the crowd at a safe distance. Up to this day, crowd control barriers are known in Belgium as Nadar barriers.
In April 1874, he lent his photo studio to a group of painters, thus making the first exhibition of the Impressionists possible.
He photographed Victor Hugo on his death-bed in 1885.
He is credited with having published (in 1886) the first photo-interview (of famous chemist Michel Eugène Chevreul, then a centenarian), and also took erotic photographs.
From 1895 until his return to Paris in 1909, the Nadar photo studio was in Marseilles (France).
Nadar died in 1910, aged 89. He was buried in Père Lachaise Cemetery in Paris.