Emilie Augusta Louise "Lizzy" Lind af Hageby (20 September 1878 – 26 December 1963) was a Swedish-British feminist and animal rights advocate who became a prominent anti-vivisection activist in England in the early 20th century.

The ensuing scandal, known as the Brown Dog affair, included a libel trial, damages for one of the researchers, and rioting in London by medical students.

This, combined with a private income from her family, enabled her to pursue her political activism, writing and travelling around the world to deliver lectures, first in opposition to child labour and prostitution, then in support of women's emancipation, and later animal rights.

[8] Lisa Gålmark writes that Lind af Hageby took to the streets, organizing rallies and speeches, when women of her class were expected to stay at home embroidering.

[9] When Lind af Hageby spoke to the Glasgow Vegetarian Society in 1914, a Daily Mail journalist reported that he had expected to find a "square jawed, high browed, slightly angular, and severely and intellectually frugal looking" woman, but instead found "a pretty, little, plump woman, with kind brown eyes, eyes that twinkle ... She was not even dowdy and undecorative.

"[10] After college Lind af Hageby spent time in Paris in 1900, where she and a Swedish friend, Leisa Katherine Schartau, visited the Pasteur Institute.

[11] They were distressed by the vivisection they saw there, and when they returned to Sweden joined the Nordiska samfundet till bekämpande av det vetenskapliga djurplågeriet (the Nordic Anti-Vivisection Society).

The 200-page manuscript contained one allegation, in a chapter called "Fun," that caught his eye, namely that a brown terrier dog had been operated on multiple times over a two-month period by several researchers, then dissected – without anaesthesia, according to the diary – in front of an audience of laughing medical students:[12]

Lind af Hageby and Schartau testified that they had watched as the dog was brought into the lecture theatre, said they had not smelled or seen any apparatus that would deliver the A.C.E.

[16] Lind af Hageby co-founded the Animal Defence and Anti-Vivisection Society (ADAVS) in 1906 with the Duchess of Hamilton, with a shop and office at 170 Piccadilly, London.

As part of the society's work, Lind af Hageby drafted a petition in or around 1906, An Anti-Vivisection Declaration, which was distributed around the world, translated into several languages, and signed by prominent anti-vivisectionists.

[18] In 1911 she was living with Margaret Damer Dawson Commandant & founder of the Women Police Service who also helped organise the International Congress of Animal Protection Societies in London in 1906.

The suit was in response to two articles by Saleeby in May 1912, prompted by a graphic vivisection display ADAVS had run in its Piccadilly shop, which Helen Rappaport writes attracted crowds of horrified onlookers.

"[4] Lind Af Hageby represented herself; this was at a time when women could not be admitted as lawyers in the UK, because they were not regarded as "persons" within the terms of the 1843 Solicitors Act.

Rappaport writes that she became involved after the war in protesting against cruel sports, including the hunting of pregnant hares, supported the Our Dumb Friends' League, and opposed the sale of old horses to slaughterhouses.

Leah Leneman writes that Lind af Hageby saw Darwin's theory of natural selection – the Origin of Species had been published in 1859 – as essential to the cause of animals, because it "brought about the decay of the old anthropocentric idea of man ...

[27] Craig Buettinger writes that feminism and anti-vivisection were strongly linked in the UK, where the comparison between the treatment of woman and animals at the hands of male scientists (and, indeed, their husbands) dominated the discourse.

But in the United States, the antivisectionists based their need to protect animals on their duties as mothers and Christians, and did not see advancing women's rights as part of that.