revealing different amounts of the dinosaurs. To mark the launch of the models, Hawkins held a dinner on New Year's Eve 1853 inside the mould of one of the Iguanodon models. Hawkins benefited greatly from the public's reaction to the dinosaurs, which was so strong it allowed for the sale of sets of small versions of the dinosaur models, priced at £30 for educational use. But the building of the models was costly (having cost around £13,729) and in 1855, the Crystal Palace Company cut Hawkins's funding. Several planned models were never made, while those half finished were scrapped, despite protest from sources including the Sunday newspaper, The Observer. Hawkins later worked on a "Paleozoic Museum" in New York's Central Park, an American equivalent to the Crystal Palace Dinosaurs. In May 1871 many of the exhibits in Hawkins' workshop were destroyed by vandals and their fragments buried, possibly including elements of the original Elasmosaurus skeleton, which the American palaeontologist Edward Drinker Cope had loaned to Hawkins for preparation at the time. With progress in palaeontology, the reputation of the Crystal Palace models declined. In 1895, the American fossil hunter Othniel Charles Marsh scorned the dinosaurs' friends as doing them a great injustice, and spoke angrily of the models. The models and the park fell into disrepair as the years went by, a process aided by the fire that destroyed the Crystal Palace itself in 1936, and the models became obscured by overgrown foliage. A full restoration of the animals was carried out in 1952 by Victor H.C. Martin, at which time the mammals on the third island were moved to less well-protected locations in the park, where they were exposed to wear and tear. The limestone cliff was blown up in the 1960s. In 2001, the display was totally renovated. The destroyed limestone cliff was completely replaced using 130 large blocks of Derbyshire limestone, many weighing over , rebuilt according to a small model made from the same number of polystyrene blocks. Fibreglass replacements were created for the missing sculptures, and badly damaged parts of the surviving models were recast. For example, some of the animals' legs had been modelled in lead, fixed to the bodies with iron rods; the iron had rusted, splitting the lead open. The models and other elements of Crystal Palace Park were classed as Grade II listed buildings from 1973. The models were extensively restored