The Brown Dog Affair was a series of demonstrations and riots surrounding a statue that had been erected in the Battersea area of London, commemorating dogs who had been killed due to vivisection.
Research:

SYMHC Classics: Dr. Lucy Hobbs Taylor
29:58

Behind the Scenes Minis: Carry-on Bags
28:38

Gustave Flaubert and the ‘Madame Bovary’ Trial
45:15