Task: Question Answering
Input (English): Passage: By the 18th century, the menagerie was open to the public; admission cost three half-pence or the supply of a cat or dog to be fed to the lions. By the end of the century, that had increased to 9 pence. A particularly famous inhabitant was Old Martin, a large grizzly bear given to George III by the Hudson's Bay Company in 1811. An 1800 inventory also listed a tiger, leopards, a hyena, a large baboon, various types of monkeys, wolves and "other animals". By 1822, however, the collection included only a grizzly bear, an elephant and some birds. Additional animals were then introduced. In 1828 there were over 280 representing at least 60 species as the new keeper Alfred Copps was actively acquiring animals.After the death of George IV in 1830, a decision was made to close down the Menagerie. In 1831, most of the stock was moved to the London Zoo which had opened in 1828. The last of the animals left in 1835, relocated to Regent's Park. This decision was made after an incident, although sources vary as to the specifics: either a lion was accused of biting a soldier, or a sailor, Ensign Seymour, had been bitten by a monkey. The Menagerie buildings were removed in 1852 but the Keeper of the Royal Menagerie was entitled to use the Lion Tower as a house for life. Consequently, even though the animals had long since left the building, the tower was not demolished until the death of Copps, the last keeper, in 1853.In 1999, physical evidence of lion cages was found, one being 2x3 metres (6.5x10 feet) in size, very small for a lion that can grow to be 2.5 meters (approximately 8 feet) long. In 2008, the skulls of two male Barbary lions (now extinct in the wild) from northwest Africa were found in the moat area of the Tower. Radiocarbon tests dated them from 1280–1385 and 1420–1480. During 2011 an exhibition was hosted at the Tower with fine wire sculptures by Kendra Haste. 
Question: What was the last name of the last keeper who died in 1853?
Output (English): Copps.