The Brown Dog Affair is one of the earliest public cases of the protest against vivisection, which is the experimental surgery carried out on living organisms, specifically animals. It came about due to allegations raised against William Bayliss of the Department of Physiology at University College London who performed illegal vivisection on a brown terrier. It was deemed cruel and illegal by NAVS, resulting in a nationwide controversy that divided the country. In 1906, a statue was erected in Battersea Park in the honor of the dog and over 200 animals that were victims at the same university. The statue mysteriously disappeared in 1910 and was again erected by NAVS in 1985.