In 1873, Kingsford met the writer Edward Maitland, a widower, who shared her rejection of materialism.
With the blessing of Kingsford's husband, the two began to collaborate, Maitland accompanying her to Paris when she decided to study medicine.
Paris was at that time the center of a revolution in the study of physiology, much of it as a result of experiments on animals, particularly dogs, and mostly conducted without anaesthetic.
Claude Bernard (1813–1878), described as the "father of physiology", was working there, and famously said that "the physiologist is not an ordinary man: he is a scientist, possessed and absorbed by the scientific idea he pursues.
He does not hear the cries of the animals, he does not see their flowing blood, he sees nothing but his idea ..."
Walter Gratzer, professor emeritus of biochemistry at King's College London, writes that significant opposition to vivisection emerged in Victorian England, in part in revulsion at the research being conducted in France.
Bernard and other well-known physiologists, such as Charles Richet in France and Michael Foster in England, were strongly criticized for their work.
British anti-vivisectionists infiltrated the lectures in Paris of François Magendie, Bernard's teacher, who dissected dogs without anaesthesia, allegedly shouting at them — "Tais-toi, pauvre bête!" (
Shut up, you poor beast!) —
while he worked.
Bernard's wife, Marie-Francoise Bernard, was violently opposed to his research, though she was financing it through her dowry.
In the end, she divorced him and set up an anti-vivisection society.
This was the atmosphere in the faculty of medicine and the teaching hospitals in Paris when Kingsford arrived, shouldering the additional burden of being a woman.
Although women were allowed to study medicine in France, Rudacille writes that they were not welcomed.
Kingsford wrote to her husband in 1874:
Things are not going well for me.
My chef at the Charité strongly disapproves of women students and took this means of showing it.
About a hundred men (no women except myself) went round the wards today, and when we were all assembled before him to have our names written down, he called and named all the students except me, and then closed the book.
I stood forward upon this, and said quietly, "Et moi aussi, monsieur." [
And me, Sir.]
He turned on me sharply, and cried, "Vous, vous n'êtes ni homme ni femme; je ne veux pas inscrire votre nom." [
You, you are neither man nor woman; I don't want to write your name.]
I stood silent in the midst of a dead silence."

Kingsford was distraught over the sights and sounds of the animal experiments she saw.
She wrote on 20 August 1879:
I have found my Hell here in the Faculté de Médecine of Paris, a Hell more real and awful than any I have yet met with elsewhere, and one that fulfills all the dreams of the mediaeval monks.
The idea that it was so came strongly upon me one day when I was sitting in the Musée of the school, with my head in my hands, trying vainly to shut out of my ears the piteous shrieks and cries which floated incessantly towards me up the private staircase ... Every now and then, as a scream more heart-rending than the rest reached me, the moisture burst out on my forehead and on the palms of my hands, and I prayed, "Oh God, take me out of this Hell; do not suffer me to remain in this awful place."

Kingsford adopted a vegetarian diet on the advice of her brother John Bonus.
She was a vice-president of the Vegetarian Society.
In 1873, Kingsford met the writer Edward Maitland, a widower, who shared her rejection of materialism. With the blessing of Kingsford's husband, the two began to collaborate, Maitland accompanying her to Paris when she decided to study medicine. Paris was at that time the center of a revolution in the study of physiology, much of it as a result of experiments on animals, particularly dogs, and mostly conducted without anaesthetic. Claude Bernard (1813–1878), described as the "father of physiology", was working there, and famously said that "the physiologist is not an ordinary man: he is a scientist, possessed and absorbed by the scientific idea he pursues. He does not hear the cries of the animals, he does not see their flowing blood, he sees nothing but his idea ..."
Walter Gratzer, professor emeritus of biochemistry at King's College London, writes that significant opposition to vivisection emerged in Victorian England, in part in revulsion at the research being conducted in France. Bernard and other well-known physiologists, such as Charles Richet in France and Michael Foster in England, were strongly criticized for their work. British anti-vivisectionists infiltrated the lectures in Paris of François Magendie, Bernard's teacher, who dissected dogs without anaesthesia, allegedly shouting at them — "Tais-toi, pauvre bête!" (Shut up, you poor beast!) — while he worked. Bernard's wife, Marie-Francoise Bernard, was violently opposed to his research, though she was financing it through her dowry. In the end, she divorced him and set up an anti-vivisection society. This was the atmosphere in the faculty of medicine and the teaching hospitals in Paris when Kingsford arrived, shouldering the additional burden of being a woman. Although women were allowed to study medicine in France, Rudacille writes that they were not welcomed. Kingsford wrote to her husband in 1874:
Things are not going well for me. My chef at the Charité strongly disapproves of women students and took this means of showing it. About a hundred men (no women except myself) went round the wards today, and when we were all assembled before him to have our names written down, he called and named all the students except me, and then closed the book. I stood forward upon this, and said quietly, "Et moi aussi, monsieur." [And me, Sir.] He turned on me sharply, and cried, "Vous, vous n'êtes ni homme ni femme; je ne veux pas inscrire votre nom." [You, you are neither man nor woman; I don't want to write your name.] I stood silent in the midst of a dead silence."
Kingsford was distraught over the sights and sounds of the animal experiments she saw. She wrote on 20 August 1879:
I have found my Hell here in the Faculté de Médecine of Paris, a Hell more real and awful than any I have yet met with elsewhere, and one that fulfills all the dreams of the mediaeval monks. The idea that it was so came strongly upon me one day when I was sitting in the Musée of the school, with my head in my hands, trying vainly to shut out of my ears the piteous shrieks and cries which floated incessantly towards me up the private staircase ... Every now and then, as a scream more heart-rending than the rest reached me, the moisture burst out on my forehead and on the palms of my hands, and I prayed, "Oh God, take me out of this Hell; do not suffer me to remain in this awful place."
Kingsford adopted a vegetarian diet on the advice of her brother John Bonus. She was a vice-president of the Vegetarian Society.
Anna Kingsford