Thug Vickery is an Anglo-Indian tiger tamer from Dulwhich. One day, he was writing a definitive book on tigers, but the librarians (or so he believed) at the British Museum were obstructing him in his mission. Near closing time, he brought a pair of hungry white tigers into the Reading room and let them go. This killed several other librarians and was the reason Groanin lost an arm. He was hated by all the librarians.